RFR: 8272369: java/io/File/GetXSpace.java failed with "RuntimeException: java.nio.file.NoSuchFileException: /run/user/0" [v2]

[Brian Burkhalter]

> This change proposes to exclude `/run/user` mounts from the test when run on Linux as they can "disappear" while the test is running.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8272369: On Linux, do not filter /run/user mounts unless an NSFE is thrown

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5136/files
  - new: https://git.openjdk.java.net/jdk/pull/5136/files/9db1d7f4..80b43b99

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5136&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5136&range=00-01

  Stats: 10 lines in 1 file changed: 7 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5136.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5136/head:pull/5136

PR: https://git.openjdk.java.net/jdk/pull/5136