Fix postgresql role for smaller memory machines.

roles/postgresql_server/tasks/main.yml

@@ -45,13 +45,17 @@
     owner=postgres
   with_items:
   - pg_hba.conf
-  - postgresql.conf
   notify:
   - restart postgresql
   tags:
   - config
   - postgresql
 
+- name: postgresql config template
+  template: dest=/var/lib/pgsql/data/postgresql.conf src=postgresql.conf
+  tags:
+  - postgresql
+
 - name: Ensure postgres has a place to backup to
   file: dest=/backups state=directory owner=postgres
   tags: