saltstack: install py3 version and always update

apt/repository/saltstack.sls

@@ -4,13 +4,10 @@ include:
 saltstack-repo:
   pkgrepo.managed:
     - humanname: repo.saltstack.com
-{%- if grains['osfinger'] == 'Debian-8' %}
-    - name: deb http://repo.saltstack.com/apt/debian/8/amd64/latest jessie main
-{%- else %}
-    - name: deb http://repo.saltstack.com/apt/debian/9/amd64/latest stretch main
-{%- endif %}
+    - name: deb http://repo.saltstack.com/py3/debian/9/amd64/latest stretch main
     - file: /etc/apt/sources.list.d/saltstack.list
     - clean_file: True
-    - key_url: https://repo.saltstack.com/apt/debian/9/amd64/latest/SALTSTACK-GPG-KEY.pub
+    - key_url: https://repo.saltstack.com/py3/debian/9/amd64/latest/SALTSTACK-GPG-KEY.pub
     - require:
       - pkg: python-apt
+      - pkg: apt-transport-https

salt/master.sls

@@ -2,7 +2,7 @@ include:
   - apt.repository.saltstack
 
 salt-master:
-  pkg.installed:
+  pkg.latest:
     - fromrepo: saltstack-repo
   service.running:
     - enable: True

salt/minion.sls

@@ -2,7 +2,7 @@ include:
   - apt.repository.saltstack
 
 salt-minion:
-  pkg.installed:
+  pkg.latest:
     - fromrepo: saltstack-repo
   service.running:
     - enable: True