8180431: Remove intermittent keyword from some no longer failing NIO tests
Summary: Remove "intermittent" keyword from @key tag,
Reviewed-by: alanb

8176744: Improve internal timing of java/nio/channels/Selector/SelectAndClose.java
Summary: Replace two sleeps with CountDownLatch+sleep and Thread.join()
Reviewed-by: rriggs, alanb

8153722: Mark java/nio/channels/Selector/SelectAndClose.java as intermittently failing
Reviewed-by: bpb, darcy

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

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