RFR: 8325525: Create jtreg test case for JDK-8325203 [v3]

[Alexey Semenyuk]

On Tue, 9 Jul 2024 10:49:06 GMT, Vanitha B P <duke at openjdk.org> wrote:

>> Created jtreg test case for [JDK-8325203](https://bugs.openjdk.org/browse/JDK-8325203) issue.
>> 
>> The JpackageTest created tests that the child process started from the app launched by jpackage launcher is not automatically terminated when the the launcher is terminated.
>
> Vanitha B P has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Addressed the review comments based on the inputs

test/jdk/tools/jpackage/apps/ChildProcessAppLauncher.java line 39:

> 37:             System.out.println("Calc id=" + process.pid());
> 38:             System.exit(0);
> 39:         }

The better alternative would be:
```String calcPath = Path.of(System.getenv("SystemRoot"), "system32", "calc.exe").toString();```

This way NPE will be thrown if `SystemRoot` env variable is not set instead of silent exit, and `FS` field is not needed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/19536#discussion_r1670627437