[maven-release-plugin] prepare release killbill-client-java-0.0.6
[maven-release-plugin] prepare release killbill-client-java-0.0.6

killbill/killbill-client-java,Cloudyle/killbill-client-java,killbill/killbill-client-java,holkra/killbill-client-java,holkra/killbill-client-java