[jdk17] RFR: 8269403: Fix jpackage tests to gracefully handle jpackage app launcher crashes

[Alexey Semenyuk]

jpackage app launcher randomly crashes JVM at termination in EMS enabled JDK builds.
Until the root cause of the issue is understood and fixed let's add a workaround to jpackage tests to run test app few more times if the first attempt resulted in app crash.

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

Commit messages:
 - whitespace clean up
 - 8269403: Fix jpackage tests to gracefully handle jpackage app launcher crashes

Changes: https://git.openjdk.java.net/jdk17/pull/153/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=153&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269403
  Stats: 9 lines in 2 files changed: 5 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/153.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/153/head:pull/153

PR: https://git.openjdk.java.net/jdk17/pull/153