Update release metadata for version 2.4.4

Change-Id: Ie1eab9abfaed746cee9b87df6e41dd1c4197a7b9
Reviewed-on: http://review.couchbase.org/43417
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Brett Lawson <brett19@gmail.com>