@Override
  public final void preTearDownCacheTestCase() {
    if (oldPropertySetting == null) {
      System.getProperties().remove(xmlProperty);
    } else {
      System.setProperty(xmlProperty, oldPropertySetting);
    }
    disconnectAllFromDS();
  }
This test exercises auto-reconnect functionality when there is a cache-server that was started by
gfsh but was configured both by gfsh and a cache.xml file. The JIRA ticket for this is
GEODE-2732.
geode-core/src/distributedTest/java/org/apache/geode/cache30/ReconnectWithCacheXMLDUnitTest.java