RFR: JDK-8289510 : Improve test coverage for XPath Axes: namespace [v3]

[Mahendra Chhipa]

> Added tests for namespace Axis. Tests incluse namspace expressions, namespace node counts and namespace node scope.

Mahendra Chhipa has updated the pull request incrementally with one additional commit since the last revision:

  Added defaukt namsespace expressions.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/9906/files
  - new: https://git.openjdk.org/jdk/pull/9906/files/be00c2c6..a75a6dc3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9906&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9906&range=01-02

  Stats: 9 lines in 1 file changed: 4 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/9906.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9906/head:pull/9906

PR: https://git.openjdk.org/jdk/pull/9906