JDK 9 RFR of 8175209: Account for race condition in java/nio/channels/AsynchronousSocketChannel/Basic.java

[Pavel Rappo]

Looks good to me (I'm not a Reviewer though).

> On 28 Feb 2017, at 21:15, Brian Burkhalter <brian.burkhalter at oracle.com> wrote:
> 
> Improved version which counts the number of invocations of CompletionHandler.completed() instead of tracking the time of the most recent invocation:
> 
> http://cr.openjdk.java.net/~bpb/8175209/webrev.01/
> 
> Also delete unused variable t0.
> 
> Thanks,
> 
> Brian
> 
> On Feb 28, 2017, at 8:25 AM, Brian Burkhalter <brian.burkhalter at oracle.com> wrote:
> 
>> Please review this test bug fix at your convenience.
>> 
>> Issue:	https://bugs.openjdk.java.net/browse/JDK-8175209
>> Patch:	http://cr.openjdk.java.net/~bpb/8175209/webrev.00/
>