Add telegraf support

Change-Id: I03bed44bafdebbcd22f487e59ef0de45dfbf3463
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 88b7f2c..023cff2 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -1,6 +1,8 @@
 parameters:
   linux:
     _support:
+      telegraf:
+        enabled: true
       collectd:
         enabled: true
       heka: