private void upgradeServer(String name, int serverPort, int locatorPort,
      GfshExecution startupExecution) {
    startupExecution.serverStopper().stop(name);
    GfshScript.of(startServerCommandWithConfig(name, serverPort, locatorPort))
        .execute(currentGfsh, tempFolder);
  }
This test iterates through the versions of Geode and executes client compatibility with
the current version of Geode.
geode-assembly/src/upgradeTest/java/org/apache/geode/management/RollingUpgradeWithSslDUnitTest.java