RFR: 8290402: jpackage exe uninstallers don't return correct exit code in case of failure

[Alexey Semenyuk]

8290402: jpackage exe uninstallers don't return correct exit code in case of failure

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

Commit messages:
 - 8290402: jpackage exe uninstallers don't return correct exit code in case of failure

Changes: https://git.openjdk.org/jdk/pull/9532/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9532&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290402
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/9532.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9532/head:pull/9532

PR: https://git.openjdk.org/jdk/pull/9532