8159690: [TESTBUG] Mark headful tests with @key headful.
Reviewed-by: simonis, alexsch

8063104: Change open awt regression tests to avoid sun.awt.SunToolkit.realSync, part 2
Reviewed-by: serb, alexsch

8037371: [macosx] Test closed/java/awt/dnd/ImageTransferTest/ImageTransferTest.html fails
Reviewed-by: anthony, serb