RFR: JDK-8292990 Improve test coverage for XPath Axes: parent [v2]

[Bill Huang]

> The goal of this task is validating the parent axis contains the parent of the context node. Context nodes include 
> - root node 
> - element nodes 
> - text nodes 
> - attribute nodes 
> - namespace nodes 
> - comment nodes

Bill Huang has updated the pull request incrementally with one additional commit since the last revision:

  Implemented review comments.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10107/files
  - new: https://git.openjdk.org/jdk/pull/10107/files/887bc08f..637b5899

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10107&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10107&range=00-01

  Stats: 17 lines in 1 file changed: 5 ins; 0 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/10107.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10107/head:pull/10107

PR: https://git.openjdk.org/jdk/pull/10107