CBQE-0: fix a typo

Change-Id: Id7402b9c3a2fa16bb880fde1f5d71482ce3fa157
Reviewed-on: http://review.couchbase.org/29554
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>