@Before
  public void startServer() {
    serverVM = clusterStartupRule.startServerVM(1, locatorVM.getPort());
  }
Extends the {@link CargoTestBase} class to support client server tests of generic app servers

Currently being used to test Jetty 9 containers in client server mode.
geode-assembly/src/distributedTest/java/org/apache/geode/session/tests/GenericAppServerClientServerTest.java