Add possibility to manage file permissions of config files

Fixes-bug: PROD-36555
Change-Id: Iff0e00cf560f25daf1fd4d9e2d698b02c8e0a0d2
diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index d761f56..3717f6d 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -2,6 +2,7 @@
 - panko
 classes:
 - service.panko.support
+- service.panko.file_permissions
 parameters:
   _param:
     keystone_panko_endpoint_type: internalURL