Update metadata for 2.1.3 release

Change-Id: Ie3197ba60c12e306a5d5731d4082319366ff899d
Reviewed-on: http://review.couchbase.org/28881
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>