Add support for Grafana

This patchs enables Grafana support and provides a new dashboard.

Change-Id: I7db2a5351de6eb4bc36224d9bddc6e9806314af3
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 697d85c..2aeb0df 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -9,3 +9,5 @@
         enabled: true
       sphinx:
         enabled: true
+      grafana:
+        enabled: true