@Override
  public final void preTearDown() throws Exception {
    // invokeInEveryVM(TXLockServiceDUnitTest.class,
    // "remoteDumpAllDLockServices");

    Invoke.invokeInEveryVM(TXLockServiceDUnitTest.class, "destroyServices");

    destroyServices();

    // // Disconnects the DistributedSystem in every VM - since
    // // each test randomly chooses whether shared memory is used
    // disconnectAllFromDS();

    lockGrantor = null;

    testTXRecoverGrantor_replyCode_PASS = false;
    testTXRecoverGrantor_heldLocks_PASS = false;
  }
Returns a previously created (or new, if this is the first time this method is called in this
VM) distributed system which is somewhat configurable via hydra test parameters.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/locks/TXLockServiceDUnitTest.java