RFR: jsr166 jdk integration 2017-12-XX

[Martin Buchholz]

http://cr.openjdk.java.net/~martin/webrevs/jdk/jsr166-integration/overview.html

With the change to the openjdk release model, jsr166 integrations will
simply be "jdk integrations" instead of e.g. "jdk10 integrations" from now
on.  (Nevertheless, we try to get in important bug fixes before jdk release
gates shut)

8193174: SubmissionPublisher invokes the Subscriber's onComplete before all
of its submitted items have been published
http://cr.openjdk.java.net/~martin/webrevs/jdk/jsr166-integration/SubmissionPublisher-race/index.html
https://bugs.openjdk.java.net/browse/JDK-8193174

8192943: Optimize atomic accumulators using VarHandle getAndSet
http://cr.openjdk.java.net/~martin/webrevs/jdk/jsr166-integration/getAndSet/index.html
https://bugs.openjdk.java.net/browse/JDK-8192943

8192944: Miscellaneous changes imported from jsr166 CVS 2017-12-XX
http://cr.openjdk.java.net/~martin/webrevs/jdk/jsr166-integration/miscellaneous/index.html
https://bugs.openjdk.java.net/browse/JDK-8192944