RFR: 8340432: Open source some MenuBar tests - Set2 [v2]

[Damon Nguyen]

> Following tests are added as part of this PR:
> 
> /java/awt/MenuBar/MenuBarOnDisabledFrame/MenuBarOnDisabledFrame.java (Manual with PassFailJFrame)
> /java/awt/MenuBar/MenuBarAddRemoveTest/MenuBarAddRemoveTest.java (Manual with PassFailJFrame)
> /java/awt/MenuBar/SetHelpMenuTest/SetHelpMenuTest.java (Manual with PassFailJFrame)
> /java/awt/MenuBar/MenuBarVisuals/MenuBarVisuals.java (Manual with PassFailJFrame)

Damon Nguyen has updated the pull request incrementally with one additional commit since the last revision:

  Review comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21251/files
  - new: https://git.openjdk.org/jdk/pull/21251/files/b93f91b5..43ab7d2b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21251&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21251&range=00-01

  Stats: 3 lines in 2 files changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/21251.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21251/head:pull/21251

PR: https://git.openjdk.org/jdk/pull/21251