CBQE-1069: minor fix in logs

Change-Id: I8411ac0f1df3b3ac7740a5d68f2a10e32e335b7a
Reviewed-on: http://review.couchbase.org/25032
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>