bump mb_master_advertised_version to [3,0,2]

Change-Id: Ie9ee8951a8a05a0372278f4fc6fafa5f47a6b9b7
Reviewed-on: http://review.couchbase.org/43374
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>