Move default PostgreSQL max_connections from vars to role defaults

Author: pablomh

src/roles/postgresql/defaults/main.yml

@@ -8,3 +8,5 @@ postgresql_restart_policy: always
 postgresql_data_dir: /var/lib/pgsql/data
 
 postgresql_admin_password: "CHANGEME"
+
+postgresql_max_connections: 500

src/vars/database.yml

@@ -43,5 +43,3 @@ postgresql_users:
     password: "{{ foreman_database_password }}"
   - name: "{{ pulp_database_name }}"
     password: "{{ pulp_database_password }}"
-
-postgresql_max_connections: 500