Enable support for telegraf

Change-Id: I3a5cade0323808ad73eb806706aaf0da777ed290
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 39ef63a..a711054 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -15,3 +15,5 @@
         enabled: true
       prometheus:
         enabled: true
+      telegraf:
+        enabled: true