[jdk11u-dev] RFR: 8306996: Open source Swing MenuItem related tests

[Amos Shi]

Backport of [JDK-8306996](https://bugs.openjdk.org/browse/JDK-8306996)
- Clean Backport
- Test Succeeded in local Dev Apple M1 Laptop

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Commit messages:
 - Backport 73491fa452e73cf7c02c577f4e3f1a34c02bea6d

Changes: https://git.openjdk.org/jdk11u-dev/pull/2369/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2369&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306996
  Stats: 459 lines in 4 files changed: 459 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2369.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2369/head:pull/2369

PR: https://git.openjdk.org/jdk11u-dev/pull/2369