[jdk17u] RFR: 8273961: jdk/nio/zipfs/ZipFSTester.java fails if file path contains '+' character

[Thejasvi Voniadka]

This is a straight, clean backport of the following change:

8273961: jdk/nio/zipfs/ZipFSTester.java fails if file path contains '+' character

The patch applied clean, and the test passed on all platforms. Please approve this review. I will request integration once the 17-ok is received.

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Commit messages:
 - Backport 7f78803b0926ea194334ad9b3c9f06cbe17a83dd

Changes: https://git.openjdk.java.net/jdk17u/pull/92/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=92&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273961
  Stats: 14 lines in 1 file changed: 9 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/92.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/92/head:pull/92

PR: https://git.openjdk.java.net/jdk17u/pull/92