Add support for telegraf

Change-Id: Id7adbb28fd4257f3cdff5208eae915f21482526f
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index a77821b..1ea9af6 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -1,6 +1,8 @@
 parameters:
   docker:
     _support:
+      telegraf:
+        enabled: true
       collectd:
         enabled: false
       heka: