RFR: 8352680: Opensource few misc swing tests

[Prasanta Sadhukhan]

Few JMenuItem and JFrame tests are opensourced..

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Commit messages:
 - 8352680: Opensource few misc swing tests
 - 8352680: Opensource few misc swing tests

Changes: https://git.openjdk.org/jdk/pull/24288/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24288&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352680
  Stats: 418 lines in 3 files changed: 418 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24288.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24288/head:pull/24288

PR: https://git.openjdk.org/jdk/pull/24288