Updated package metadata for 1.2.1 release.

Updated package to 1.2.1 as 1.2.0 package was broken
and would not install.

Change-Id: Ied125cb9b51b1ad5a6a27bca8bfcf7f3458b8a34
Reviewed-on: http://review.couchbase.org/29339
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Tested-by: Brett Lawson <brett19@gmail.com>