RFR: 8372385: tools/jpackage/junit/share/jdk.jpackage/jdk/jpackage/internal/cli/MainTest.java fails

[Alexey Semenyuk]

Fix MainTest.java to ignore optional environment-specific errors in jpackage's output

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Commit messages:
 - 8372385: tools/jpackage/junit/share/jdk.jpackage/jdk/jpackage/internal/cli/MainTest.java fails

Changes: https://git.openjdk.org/jdk/pull/28519/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28519&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372385
  Stats: 59 lines in 1 file changed: 53 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/28519.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28519/head:pull/28519

PR: https://git.openjdk.org/jdk/pull/28519