[maven-release-plugin] prepare release 4.2.2
[maven-release-plugin] prepare for next development iteration
Merge pull request #541 from sharwell/release/4.2.2

Release/4.2.2
Remove inadvertent use of new Java 7 API
[maven-release-plugin] prepare release 4.2.2-opt
Merge branch release/4.2.2-opt into optimized
Merge remote-tracking branch 'antlr/master' into optimized