CBQE-0: fix tuq join+where test

Change-Id: I8b7259e15c8f2a6acce2b9321801d8e69e79a4bd
Reviewed-on: http://review.couchbase.org/34334
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>