MB-10020 export ale:start_logger/3

Change-Id: Ie399edbdd1f8308b3d3a11257c5f32cca7c8303b
Reviewed-on: http://review.couchbase.org/36667
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Artem Stemkovski <artem@couchbase.com>