[jdk17u-dev] RFR: 8289510: Improve test coverage for XPath Axes: namespace

[Goetz Lindenmaier]

I backport this for parity with 17.0.9-oracle.

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Commit messages:
 - Backport 3d254d3c8ea7f409e8f709413f80d88913eb0ce8

Changes: https://git.openjdk.org/jdk17u-dev/pull/1618/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1618&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8289510
  Stats: 245 lines in 1 file changed: 245 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1618.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1618/head:pull/1618

PR: https://git.openjdk.org/jdk17u-dev/pull/1618