[maven-release-plugin] prepare release checkstyle-4.0.0-beta2
[maven-release-plugin] prepare release checkstyle-4.0.0-beta2

jenkinsci/checkstyle-plugin,jenkinsci/checkstyle-plugin,jenkinsci/checkstyle-plugin,recena/checkstyle-plugin,recena/checkstyle-plugin,recena/checkstyle-plugin