8164169: Miscellaneous changes imported from jsr166 CVS 2016-09Reviewed-by: martin, psandoz, shade
8142441: Improve jtreg tests for java.util.concurrentReviewed-by: martin, psandoz, chegar, shade, plevart
8134855: Bulk integration of java.util.concurrent.locks classes8051848: ReentrantReadWriteLock.ReadLock fails on unlock by different thread8049843: Lack of save / restore interrupt mechanism undermines the StampedLockReviewed-by: martin, psandoz, chegar