fix hello-world.war for jboss6

- use separate servlet-mapping elements for each url-pattern;
  previously had been changed for testing url-mappings to have:
    <servlet-mapping>
        <servlet-name>HelloServlet</servlet-name>
        <url-pattern>/hello</url-pattern>
        <url-pattern>/hello/*</url-pattern>
        <url-pattern>/goodbye/*</url-pattern>
    </servlet-mapping>
Fix TomcatServerIntegrationTest
Fix ControlledDynamicWebAppCluster rebind test

- The DeferredSupplier anonymous inner class used in the cluster's
  config was not serializable