RFR: 8277159: Fix java/nio/file/FileStore/Basic.java test by ignoring /run/user/* mount points [v2]

[Aleksey Shipilev]

On Wed, 17 Nov 2021 12:55:10 GMT, Alex Kasko <akasko at openjdk.org> wrote:

>> …/user/* mount points
>> 
>> The fix to the test is the same as in #5136 . The possible problem with this test was identified in [this comment](https://github.com/openjdk/jdk/pull/5136#issuecomment-900402107), however FileSystemException is thrown instead of NoSuchFileException in this case, thus the special check for "/run/user" is added.
>
> Alex Kasko has updated the pull request incrementally with one additional commit since the last revision:
> 
>   remove bug id

Marked as reviewed by shade (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/6399