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

[Vanitha B P]

> 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

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19536/files
  - new: https://git.openjdk.org/jdk/pull/19536/files/4d22961a..b3275577

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19536&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19536&range=01-02

  Stats: 270 lines in 4 files changed: 129 ins; 141 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19536.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19536/head:pull/19536

PR: https://git.openjdk.org/jdk/pull/19536