Remove unneeded new lines in the end of messages.

Change-Id: I302a7d065e530f7ab6fc48764eedc8b169988f3c
Reviewed-on: http://review.couchbase.org/37740
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Artem Stemkovski <artem@couchbase.com>