Add possibility to manage file permissions of config files

Fixes-bug: PROD-36553
Change-Id: I4a8314449ecf6cb56e32fa04236899f1a914e164
diff --git a/metadata/service/file_permissions.yml b/metadata/service/file_permissions.yml
new file mode 100644
index 0000000..fed5690
--- /dev/null
+++ b/metadata/service/file_permissions.yml
@@ -0,0 +1,5 @@
+parameters:
+  gnocchi:
+    directories:
+      /etc/gnocchi:
+        mode: '0750'
\ No newline at end of file