Add and Enable Telegraf input

Change-Id: I798b254107f5c3d8ad68bdc988e9b74cfb2d6773
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 23f1bcc..2d7b736 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -12,4 +12,6 @@
       grafana:
         enabled: true
       prometheus:
+        enabled: true
+      telegraf:
         enabled: true
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