Update packaging metadata for 2.3.0 GA

Change-Id: Iecfe0cadf1b2953113c4a2fea42785ec19e2583a
Reviewed-on: http://review.couchbase.org/34145
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>