when you configure HornetQHTWorkItehHandler and you point to a remote service (127.0.0.1:5153) that you need to ensure that the server on that host and port is up and running. Usually that means you need to start the jbpm on AS7 server and then try to execute the process from eclipse. Alterative you can setup HornetQ task server as part of your eclipse test but that requires bit more work.
HTH