CBQE-0: fix typo in tuq-joins conf file

Change-Id: I516f636b7291e36f400126faf92a06e2e37c6a7d
Reviewed-on: http://review.couchbase.org/34628
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>