Add support for Grafana

This patch enables support for Grafana and provides a new dashboard.

Change-Id: Ib565c0e1c0007ea2aa3e25ea0e300cd25c951eda
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index df9ad6b..6f76ed5 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -11,3 +11,5 @@
         enabled: true
       config:
         enabled: true
+      grafana:
+        enabled: true