Bump version 1.2.2

Change-Id: Ibf7f3c63dba3f8c61ac9f28c5da1a9a711918749
Reviewed-on: http://review.couchbase.org/24504
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>