8202062: Put FileChannel and FileOutpuStream variants of AtomicAppend on problem list

[Alan Bateman]

On 24/04/2018 23:15, Brian Burkhalter wrote:
> https://bugs.openjdk.java.net/browse/JDK-8202062
>
> Recently more frequent failures have been observed on macOS. Put on the problem list until the underlying cause can be determined.
>
I think it would be better to change the tests to pass silently when 
running on macOS 10.13 or higher. At least from first look, that is 
where the issue is.

-Alan