MB-11104 Skip the rest of items if all cursors are repositioned

Change-Id: I6a53fb4524a1448c22c8c461e4d640155b8fc3dc
Reviewed-on: http://review.couchbase.org/37357
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Chiyoung Seo <chiyoung@couchbase.com>