[maven-release-plugin] prepare release zxing-2.2

git-svn-id: https://zxing.googlecode.com/svn/trunk@2752 59b500cc-1b3d-0410-9834-0bbf25fbcc57
[maven-release-plugin] rollback the release of zxing-2.2

git-svn-id: https://zxing.googlecode.com/svn/trunk@2755 59b500cc-1b3d-0410-9834-0bbf25fbcc57
Or do the child modules need their own scm stanza

git-svn-id: https://zxing.googlecode.com/svn/trunk@2757 59b500cc-1b3d-0410-9834-0bbf25fbcc57