RFR: 8367988: NewFileSystemTests.readOnlyZipFileFailure fails when run by root user

[Francesco Andreuzzi]

I propose a small patch to skip a tier2 test which fails when it runs as the root user. The test expects an exception when it tries to open a read-only file as `rw`, but this does not happen for the root user.

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Commit messages:
 - skip

Changes: https://git.openjdk.org/jdk/pull/27376/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27376&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367988
  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27376.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27376/head:pull/27376

PR: https://git.openjdk.org/jdk/pull/27376