Update manila config file permissions

Change-Id: Id1513e8d3ff8e4e0251d452bc37d6b7fedb09162
Related-Prod: PROD-20751
diff --git a/manila/_common.sls b/manila/_common.sls
index 383222c..35c9d1d 100644
--- a/manila/_common.sls
+++ b/manila/_common.sls
@@ -16,6 +16,8 @@
   file.managed:
   - source: salt://manila/files/{{ cfg.version }}/manila.conf
   - template: jinja
+  - mode: 0640
+  - group: manila
   - require:
     - pkg: manila_common.pkgs
     - sls: manila._ssl.mysql