Add collectd support

Change-Id: Icd8174b09922a99d3132e93a8ce5151e7cc51a18
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index bb1eadc..5f7213c 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -2,7 +2,7 @@
   cinder:
     _support:
       collectd:
-        enabled: false
+        enabled: true
       heka:
         enabled: true
       sensu: