Add Telegraf support

Change-Id: I3c8f534d936566bd522892b9082711b353a92aec
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index f119a55..005b24e 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -11,3 +11,5 @@
         enabled: true
       grafana:
         enabled: true
+      telegraf:
+        enabled: true