RFR: 8039081: [TEST_BUG] Test java/awt/TrayIcon/PopupMenuLeakTest/PopupMenuLeakTest.java fails

[Hohensee, Paul]

Please review this backport, which is part of the patch tail for https://icedtea.classpath.org/bugzilla/show_bug.cgi?id=3077.

JBS issue: https://bugs.openjdk.java.net/browse/JDK-8039081
Commit: http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/42925c7a35aa
Webrev: http://cr.openjdk.java.net/~phh/8039081/webrev.8u.jdk.01/

Patch applies cleanly after the 3077 sequence, except for copyright dates in TrayIcon.java and TrayIconPeer.java, and the lack of an @headful attribute in the current 8u version of PopupMenuLeakTest.java.

Thanks,
Paul