grafana.sls add admin_password logic

grafana/grafana.sls

@@ -107,6 +107,7 @@ grafana-net-proxy:
     - mode: '0644'
     - template: jinja
     - context:
+      admin_password: "{{ grafana.get('admin_password', '') }}"
       domain: "{{ domain }}"
       data_dir: "{{ data_dir }}"
       provisioning_dir: "{{ provisioning_dir }}"