[maven-release-plugin] prepare release msgpack-0.6.7
[maven-release-plugin] prepare release msgpack-0.6.7

xerial/msgpack-java,msgpack/msgpack-java,jackyglony/msgpack-java,dongjiaqiang/msgpack-java,dongjiaqiang/msgpack-java,xerial/msgpack-java,suzukaze/msgpack-java,DataDog/msgpack-java,jackyglony/msgpack-java,DataDog/msgpack-java,muga/msgpack-java-0.7,suzukaze/msgpack-java,komamitsu/msgpack-java,mikolak-net/msgpack-java,mikolak-net/msgpack-java,xuwei-k/msgpack-java,msgpack/msgpack-java,komamitsu/msgpack-java,xuwei-k/msgpack-java