RFR: 8325525: Create jtreg test case for JDK-8325203

[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.

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Commit messages:
 - Whitespace Fixes 2
 - Fixed whitespaces
 - Fixed whitespaces for 8325525:Create jtreg test case for JDK-8325203
 - 8325525: Create jtreg test case for JDK-8325203
 - 8325525: Create jtreg test case for JDK-8325203

Changes: https://git.openjdk.org/jdk/pull/19536/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19536&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325525
  Stats: 241 lines in 2 files changed: 241 ins; 0 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