[maven-release-plugin] rollback the release of zxing-2.2

git-svn-id: http://zxing.googlecode.com/svn/trunk@2729 59b500cc-1b3d-0410-9834-0bbf25fbcc57
[maven-release-plugin] prepare release zxing-2.2

git-svn-id: http://zxing.googlecode.com/svn/trunk@2731 59b500cc-1b3d-0410-9834-0bbf25fbcc57