RFR: 8316240: Open source several add/remove MenuBar manual tests [v2]

[Alexander Zvegintsev]

> Open sourcing several MenuBar manual tests
> 
> java/awt/MenuBar/AddRemoveMenuBarTests/AddRemoveMenuBarTest_1.java
> java/awt/MenuBar/AddRemoveMenuBarTests/AddRemoveMenuBarTest_2.java
> java/awt/MenuBar/AddRemoveMenuBarTests/AddRemoveMenuBarTest_3.java
> java/awt/MenuBar/AddRemoveMenuBarTests/AddRemoveMenuBarTest_4.java

Alexander Zvegintsev has updated the pull request incrementally with one additional commit since the last revision:

  fix imports

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15800/files
  - new: https://git.openjdk.org/jdk/pull/15800/files/07d8e583..ddc3a139

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15800&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15800&range=00-01

  Stats: 11 lines in 4 files changed: 0 ins; 7 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/15800.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15800/head:pull/15800

PR: https://git.openjdk.org/jdk/pull/15800