Add and activate Apache telegraf input

Change-Id: I5b4e72584b41b7a9b480b4343f30b7a6efd83c99
Depends-On: I926da5af7f96e7d40a76626527c2b54c52c6ee01
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 52c321a..ee4398e 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -13,3 +13,5 @@
         enabled: true
       grafana:
         enabled: true
+      telegraf:
+        enabled: true