JDK 10 RFR of JDK-8183989: Mark java/nio/channels/DatagramChannel/Disconnect.java as intermittently failing

[Amy Lu]

java/nio/channels/DatagramChannel/Disconnect.java

This test is known to fail intermittently (JDK-8154018), this patch is 
to mark the test accordingly with keyword 'intermittent'.

Please review.

bug: https://bugs.openjdk.java.net/browse/JDK-8183989
webrev: http://cr.openjdk.java.net/~amlu/8183989/webrev.00/

Thanks,
Amy

--- old/test/java/nio/channels/DatagramChannel/Disconnect.java	2017-07-07 11:07:32.000000000 +0800
+++ new/test/java/nio/channels/DatagramChannel/Disconnect.java	2017-07-07 11:07:32.000000000 +0800
@@ -1,5 +1,5 @@
  /*
- * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
@@ -23,6 +23,7 @@
  
  /* @test
   * @bug 7132924
+ * @key intermittent
   * @summary Test DatagramChannel.disconnect when DatagramChannel is connected to an IPv4 socket
   * @run main Disconnect
   * @run main/othervm -Djava.net.preferIPv4Stack=true Disconnect