Add possibility to manage file permissions of config files

Fixes-bug: PROD-36553
Change-Id: I4a8314449ecf6cb56e32fa04236899f1a914e164
diff --git a/metadata/service/server/cluster.yml b/metadata/service/server/cluster.yml
index 82b8957..feb8a7d 100644
--- a/metadata/service/server/cluster.yml
+++ b/metadata/service/server/cluster.yml
@@ -3,6 +3,7 @@
 classes:
 - service.gnocchi.common.cluster
 - service.gnocchi.support
+- service.gnocchi.file_permissions
 parameters:
   gnocchi:
     server: