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

8022213: Intermittent test failures in java/net/URLClassLoader
Reviewed-by: dxu, alanb

6829919: URLClassLoader.close() doesn't close resource file if getResourceAsStream(...) was called before
Reviewed-by: chegar