Code Review 6933618: java/net/MulticastSocket/NoLoopbackPackets.java fails when rerun

[Christopher Hegarty - Sun Microsystems Ireland]

Hi Alan, Michael,

Trivial change.

6933618: java/net/MulticastSocket/NoLoopbackPackets.java fails when rerun

If java/net/MulticastSocket/NoLoopbackPackets.java is run in a batch 
which contains all the MulticastSocket tests then it will fail on reruns 
with java.lang.NoSuchMethodError: Sender.<init>.

The reason it fails is that there is another test, 
java/net/MulticastSocket/SetOutgoingIf.java, that has a class named 
Sender. This test is typically run after NoLoopbackPackets so its Sender 
class gets left over in the classes directory and is used in subsequest 
runs of NoLoopbackPackets. The Sender class in NoLoopbackPackets is not 
compatible with the Sender class in SetOutgoingIf.

NoLoopbackPackets should define Sender as an internal class avoiding 
this name conflict. Also remove hardcoded port number.

Webrev:
   http://cr.openjdk.java.net/~chegar/6933618/webrev.00/

Thanks,
-Chris.