cbqe-2362: fix hanging job

Change-Id: I6cda9e00aac160950e598a4eb976f17a2c0765cb
Reviewed-on: http://review.couchbase.org/40182
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>