CBQE-2489: add regression for MB-12755

Change-Id: I0fcb141dc2b5c2767aa8f7ba1ed9d60846ff07df
Reviewed-on: http://review.couchbase.org/43794
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>
Tested-by: buildbot <build@couchbase.com>