CBQE-2454: fix cluster tests n1ql

Change-Id: Ica7d6b522b3fae056c10096230a16fc0bcd94682
Reviewed-on: http://review.couchbase.org/42791
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>