MB-8166 Check an item value size in setWithMeta operation.

If an item value size in setWithMeta exceeds the max size allowed,
the corresponding error should be responded to the client.

Change-Id: I7ea90d30dec0d39b669995364c2399944f6e5141
Reviewed-on: http://review.couchbase.org/26269
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Reviewed-by: Jin Lim <jin@couchbase.com>
Tested-by: Chiyoung Seo <chiyoung.seo@gmail.com>