MB-11890: Active vb shouldn't initiate add Stream req

Change-Id: Ic902e632d52f426a73d7708f9c69854dc7fab874
Reviewed-on: http://review.couchbase.org/40641
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>