private static void tearDownVM() {
    closeCache();
    DistributedRule.TearDown.tearDownInVM();
    cleanDiskDirs();
  }
{@code postTearDown()} is invoked after {@link #doTearDownDistributedTestCase()}.

<p>
Override this as needed. Default implementation is empty.
geode-dunit/src/main/java/org/apache/geode/test/dunit/internal/JUnit4DistributedTestCase.java