Add support for prometheus

Change-Id: I66576b4ed40ef160c5f13747a908f018f252b6b4
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 023cff2..7699edd 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -1,6 +1,8 @@
 parameters:
   linux:
     _support:
+      prometheus:
+        enabled: true
       telegraf:
         enabled: true
       collectd: