8229280: Test failures on several linux hosts after JDK-8181493

[Alan Bateman]

On 29/08/2019 01:56, Brian Burkhalter wrote:
>
> Done [1].
The test description needs `@modules java.base/sun.nio.fs:+open` to open 
the package to the test. That should allow L42-50 to be cleaned up.

> Note however that futimens() can be supported without it actually 
> being able to set the timestamps to nanosecond precision, e.g., for 
> HFS file systems on macOS. Therefore the test will still pass if the 
> actual and expected values are not equal due to truncation of a 
> multiple of three digits of precision.
Is there any way that we could use the FileStore::type to target this 
test to specify file systems that are known to support nanosecond precision?

-Alan