8160974: [TESTBUG] Mark more headful tests with @key headful.
Reviewed-by: serb, simonis

8063106: Change open swing regression tests to avoid sun.awt.SunToolkit.realSync, part 1
Reviewed-by: pchelko, serb

8028537: PPC64: Updated the JDK regression tests to run on AIX
Reviewed-by: alanb
Contributed-by: luchsh@linux.vnet.ibm.com, spoole@linux.vnet.ibm.com, volker.simonis@gmail.com

8016551: JMenuItem in WindowsLookAndFeel can't paint default icons
Reviewed-by: alexsch, serb