[jdk17u-dev] RFR: 8307130: Open source few Swing JMenu tests

[Victor Rudometov]

Backport https://github.com/openjdk/jdk/commit/d9052b946682d1c0f2629455d73fe4e6b95b29db
https://bugs.openjdk.org/browse/JDK-8307130 Open source few Swing JMenu tests

Clean backport, new tests, low risk
Checked on macOS x64, linux x64

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Commit messages:
 - Backport d9052b946682d1c0f2629455d73fe4e6b95b29db

Changes: https://git.openjdk.org/jdk17u-dev/pull/1356/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1356&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307130
  Stats: 293 lines in 4 files changed: 293 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1356.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1356/head:pull/1356

PR: https://git.openjdk.org/jdk17u-dev/pull/1356