8171886: Miscellaneous changes imported from jsr166 CVS 2017-02
Reviewed-by: martin, psandoz

8142441: Improve jtreg tests for java.util.concurrent
Reviewed-by: martin, psandoz, chegar, shade, plevart

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

8016311: Update j.u.c. tests to avoid using Thread.stop(Throwable)
Reviewed-by: alanb
Contributed-by: martinrb@google.com

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

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