Child projects in helloworld-mbean quickstart have redundant helloworld-mbean- prefix in artifact name and web application URL

Child projects in helloworld-mbean quickstart have redundant helloworld-mbean- prefix in artifact name and web application URL, resulting in clunky artifact names like helloworld-mbean-helloworld-mbean-service.sar or http://localhost:8080/helloworld-mbean-helloworld-mbean-webapp/ . Once this is changed, the readme file needs to be adjusted accordingly.