8185500: [TESTBUG] Add keywords headful/printer in java/awt and javax tests.
Summary: Add new keyword 'printer'. Some minor test fixes to show headless exception. Add some @requires windows.
Reviewed-by: serb, mbaesken

6943119: Rebrand source copyright notices
Reviewed-by: darcy, weijun

6821495: test/java/awt/print/PrinterJob/PrtException.java fails
Reviewed-by: igor, prr

6731937: javax/print/CheckDupFlavor.java fails
Reviewed-by: campbell, tdv