Fix file permissions.

Fixes-bug: PROD-36505
Change-Id: I20bcf7968b9bfafbd89e9cd8ae6bef65faecf9be
diff --git a/metadata/service/control/cluster.yml b/metadata/service/control/cluster.yml
index 232c7d5..24dde8f 100644
--- a/metadata/service/control/cluster.yml
+++ b/metadata/service/control/cluster.yml
@@ -2,6 +2,7 @@
 - nova
 classes:
 - service.nova.support
+- service.nova.file_permissions
 parameters:
   _param:
     nova_vncproxy_url: http://${_param:single_address}:6080