Add Grafana support

Change-Id: If084d3b0044d0e682b5367013c48193b7f20c873
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index e703788..903e306 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -11,3 +11,5 @@
         enabled: true
       iptables:
         enabled: true
+      grafana:
+        enabled: true