[BP]MB-7353: Move featured data into Stored Value class

Change-Id: Ibe3f5be109864a01b34d43be839a39c1f59c7b8f
Reviewed-on: http://review.couchbase.org/25276
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>