RFR: 8325525: Create jtreg test case for JDK-8325203 [v2]

[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:

  8325525 Addressed review comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19536/files
  - new: https://git.openjdk.org/jdk/pull/19536/files/86837571..4d22961a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19536&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19536&range=00-01

  Stats: 309 lines in 3 files changed: 104 ins; 204 del; 1 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