@BeforeClass
  public static void caseSetUp() throws Exception {
    disconnectAllFromDS();
  }
Test reconnecting a durable client that is using the locator to discover its servers

@since GemFire 5.7
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/DurableClientReconnectAutoDUnitTest.java