RFR: 8375585: Test java/lang/ProcessBuilder/PipelineLeaksFD.java failed [v4]

[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 with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - Merge
 - Removed use of count.
 - Refactor checks of child pipe use against parent use.
   Removed simple counts of names as they were unreliable.
 - 8375585: Test java/lang/ProcessBuilder/PipelineLeaksFD.java failed
   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.

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

Changes: https://git.openjdk.org/jdk/pull/29530/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29530&range=03
  Stats: 84 lines in 3 files changed: 41 ins; 15 del; 28 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