CBQE-2458: update dml tests

Change-Id: I929f1110fe92477a9762c0d2fbb80d22d8cdbd27
Reviewed-on: http://review.couchbase.org/43747
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>