CBQE-0: fix typo in n1ql logs

Change-Id: Id716e9ed1db8a3c76e67bf5b2663e768e62f281a
Reviewed-on: http://review.couchbase.org/42694
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>