RFR: JDK-7155591 - [macosx] regression test java/net/MulticastSocket/SetOutgoingIf.java fail

[Mark Sheppard]

Hi,
    please oblige and review the following change
http://cr.openjdk.java.net/~msheppar/7155591/webrev/
to address the issue raised in
https://bugs.openjdk.java.net/browse/JDK-7155591

this identifies that the awdl interface causes issues for the 
SetOutgoingIf multicast socket test, and
the proposed solution is exclude it from test scenarios. As such, the change
adds a check to ignore this network interface during interface selection.

regards
Mark