Add support for Grafana

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

Change-Id: I2ecc95e1626b048844f42fa9249d7250a1f4187f
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index f489ccd..41e4b3f 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -11,3 +11,5 @@
         enabled: true
       config:
         enabled: true
+      grafana:
+        enabled: true