CBQE-1069: minor fix in logs

Change-Id: I6a14e5a8516fbc2222138e5f209214f079959d16
Reviewed-on: http://review.couchbase.org/25108
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>