CBQE-1538 add registry ID
of version 2.2.1 to testconstant

Change-Id: I4c22d8b9f65f3c885be24afe68d6aa9c2ecd8d23
Reviewed-on: http://review.couchbase.org/29229
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>