Add Telegraf support

Change-Id: I22f64b896daca2f0bbcc4672d2eaf7b65d20b813
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 3d7dee6..5ac01ff 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -13,3 +13,5 @@
         enabled: true
       grafana:
         enabled: true
+      telegraf:
+        enabled: true