MB-9921: Convert StoredValue to queued_item when queueing for replication

Change-Id: Ibaf9f07e1e4585736a615215090fba69fdb70085
Reviewed-on: http://review.couchbase.org/32496
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>