Add Grafana dashboard for NTP

Change-Id: Ia21e0fad1fd14cb69f09fc3a9253d4ad00e239eb
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index fcf1d6c..a962114 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -13,3 +13,5 @@
         enabled: true
       telegraf:
         enabled: true
+      grafana:
+        enabled: true