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

8023528: Rename Comparator combinators to disambiguate overloading methods
Reviewed-by: mduigou, smarks

8009736: Comparator API cleanup
Reviewed-by: psandoz, briangoetz, mduigou, plevart