MB-100 change mb_master_advertised_version to [2, 3, 0]

Change-Id: Ia4c9928e51d2be4852055444affbb90a13fd7a71
Reviewed-on: http://review.couchbase.org/29519
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Artem Stemkovski <artem@couchbase.com>