MB-7211: add default port to hostname

Change-Id: I953ba8203c34afc3f1b287d502ec8d0f663bbdad
Reviewed-on: http://review.couchbase.org/26262
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>