python3 fix modules "unorderable types: dict() < dict()"

----------                                                                                                                                                                                                                                                                     │·
          ID: /etc/prometheus/prometheus.yml                                                                                                                                                                                                                                   │·
    Function: file.managed                                                                                                                                                                                                                                                     │·
      Result: False                                                                                                                                                                                                                                                            │·
     Comment: Unable to manage file: Jinja error: unorderable types: dict() < dict()                                                                                                                                                                                           │·
              Traceback (most recent call last):                                                                                                                                                                                                                               │·
                File "/usr/lib/python3/dist-packages/salt/utils/templates.py", line 392, in render_jinja_tmpl                                                                                                                                                                  │·
                  output = template.render(**decoded_context)                                                                                                                                                                                                                  │·
                File "/usr/lib/python3/dist-packages/jinja2/environment.py", line 1008, in render                                                                                                                                                                              │·
                  return self.environment.handle_exception(exc_info, True)                                                                                                                                                                                                     │·
                File "/usr/lib/python3/dist-packages/jinja2/environment.py", line 780, in handle_exception                                                                                                                                                                     │·
                  reraise(exc_type, exc_value, tb)                                                                                                                                                                                                                             │·
                File "/usr/lib/python3/dist-packages/jinja2/_compat.py", line 37, in reraise                                                                                                                                                                                   │·
                  raise value.with_traceback(tb)                                                                                                                                                                                                                               │·
                File "<template>", line 53, in top-level template code                                                                                                                                                                                                         │·
                File "/var/cache/salt/minion/extmods/modules/prometheus.py", line 3, in prometheus_targets_for_grain                                                                                                                                                           │·
                  return [ remote_grains[key] for remote_grains in sorted(values) if key in remote_grains ]                                                                                                                                                                    │·
              TypeError: unorderable types: dict() < dict()                                                                                                                                                                                                                    │·
                                                                                                                                                                                                                                                                               │·
              ; line 53                                                                                                                                                                                                                                                        │·
                                                                                                                                                                                                                                                                               │·
              ---                                                                                                                                                                                                                                                              │·
              [...]                                                                                                                                                                                                                                                            │·
                      - 'localhost:9100'                                                                                                                                                                                                                                       │·
              {%- for remote_grains in salt['mine.get']('*', 'grains.items', tgt_type='glob').values() if remote_grains.fqdn != grains.fqdn %}                                                                                                                                 │·
                      - '{{ remote_grains.fqdn }}:9100'                                                                                                                                                                                                                        │·
              {%- endfor %}                                                                                                                                                                                                                                                    │·
                                                                                                                                                                                                                                                                               │·
              {% set nginx_targets = salt['prometheus.prometheus_targets_for_grain']('prometheus_nginx_export') %}    <======================                                                                                                                                  │·
                - job_name: nginx                                                                                                                                                                                                                                              │·
                  scheme: https                                                                                                                                                                                                                                                │·
                  metrics_path: /_metrics                                                                                                                                                                                                                                      │·
                  static_configs:                                                                                                                                                                                                                                              │·
                    - targets: {{ nginx_targets|yaml }}                                                                                                                                                                                                                        │·
              [...]                                                                                                                                                                                                                                                            │·
              ---                                                                                                                                                                                                                                                              │·
     Started: 19:18:06.413857                                                                                                                                                                                                                                                  │·
    Duration: 910.485 ms