Add cpu allocation ratio to OpenStack Telegraf plugin configuration

Change-Id: I020ce3f3d1d348d7f6a9d1ae91d9d716c4c6d59e
Depends-On: Iadb37c5511763a48e5185768b9369abc95864547
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index b1d9bcd..2c762b0 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -13,3 +13,5 @@
         enabled: true
       grafana:
         enabled: true
+      telegraf:
+        enabled: true