MB-100: comment a test

Change-Id: I9244d62ee83aecb3f00c6a63b9f119fb1836c78f
Reviewed-on: http://review.couchbase.org/24538
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>