RFR: 8375585: Test java/lang/ProcessBuilder/PipelineLeaksFD.java failed [v2]

[Roger Riggs]

> Revised test to explicitly compare file descriptor info only from parent and child.
> If additional fd's are present in the child, it is hard to know their origin but they do not necessarily indicate a bug in Process launch.
>  
> Remove from the problem list.

Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:

  Refactor checks of child pipe use against parent use.
  Removed simple counts of names as they were unreliable.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/29530/files
  - new: https://git.openjdk.org/jdk/pull/29530/files/d42ee5b3..0cf0611f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29530&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29530&range=00-01

  Stats: 39 lines in 1 file changed: 15 ins; 4 del; 20 mod
  Patch: https://git.openjdk.org/jdk/pull/29530.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29530/head:pull/29530

PR: https://git.openjdk.org/jdk/pull/29530