CBQE-1798:add test for mb-8286

Change-Id: Iab839bdb9e644a06ba7767519fd52cb029bf0d0a
Reviewed-on: http://review.couchbase.org/31269
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>