RFR: 8077408 javax/management/remote/mandatory/notif/NotSerializableNotifTest.java fails due to Port already in use: 2468

[Shanliang Jiang]

Hi,

Please review this test fix.
Instead to specify a port, we use "0" to get a free port.

I also remove the test waiting time variable, better to reply on 
directly the test harness timeout.

bug: https://bugs.openjdk.java.net/browse/JDK-8077408
webrev: http://cr.openjdk.java.net/~sjiang/JDK-8077408/00/


Thanks,
Shanliang