Return clusterConfig in response, when NOT_MY_VB

Context:CompactDB

Change-Id: Iaabcd2f1a1f6bbe672f83cdf679b64f2a08cf9b2
Reviewed-on: http://review.couchbase.org/39144
Reviewed-by: Sundararaman Sridharan <sundar@couchbase.com>
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>