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

8017472: [macosx] Transparency demo is not correctly dragged on the second monitor
Reviewed-by: pchelko, serb