Add possibility to manage file permissions of config files

Fixes-bug: PROD-36556
Change-Id: I223410209d15e5232bdf85c5b1634a5e00401c71
diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index 5615125..26cbfb0 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -2,6 +2,7 @@
 - aodh
 classes:
 - service.aodh.support
+- service.aodh.file_permissions
 parameters:
   _param:
     keystone_aodh_endpoint_type: internalURL