8029235: Update copyright year to match last edit in jdk8 jdk repository for 2013
Summary: updated files with 2011, 2012 and 2013 years according to the file's last updated date
Reviewed-by: tbell, lancea, chegar

8027696: Incorrect copyright header in the tests
Reviewed-by: alanb, malenkov, mullan

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

4874070: invoking DragSource's startDrag with an Image renders no image on drag
Reviewed-by: art, denis, alexp