Support only including postgres.client

postgres/init.sls

@@ -16,6 +16,10 @@ postgresql-installed:
   pkg.installed:
     - name: {{ postgres.pkg }}
     - refresh: {{ postgres.use_upstream_repo }}
+{% if postgres.use_upstream_repo %}
+    - require:
+      - pkgrepo: install-postgresql-repo
+{%- endif %}
 
 # make sure the data directory and contents have been initialized
 postgresql-cluster-prepared: