@Before
  public void setup() {
    // Start the locator
    MemberVM locatorVM = clusterStartupRule.startLocatorVM(0);
    locatorPort = locatorVM.getPort();

  }
The purpose of RebalanceOperationComplexDistributedTest is to test rebalances
across zones and to ensure that enforceUniqueZone behavior of redundancy zones
is working correctly.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/control/RebalanceOperationComplexPart2DistributedTest.java