Add support from prometheus

Change-Id: I07c9e34a14b79caf8b5d4f7c837882a464511c7e
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 1fc7796..12a793d 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -1,4 +1,5 @@
 parameters:
   fluentd:
     _support:
-      enabled: true
+      prometheus:
+        enabled: true