RFR: 8340417: Open source some MenuBar tests - Set1

[Damon Nguyen]

Following tests are added as part of this PR:

./java/awt/MenuBar/MenuBarRemoveMenu/MenuBarRemoveMenuTest.java - MANUAL
./java/awt/MenuBar/MenuNPE/MenuNPE.java - AUTO
./java/awt/MenuBar/MenuBarSetFont/CellsResize.java - MANUAL
./java/awt/MenuBar/SetMBarWhenHidden/SetMBarWhenHidden.java - CONVERTED TO AUTO

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Commit messages:
 - Remove duplicate header
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/21335/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21335&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340417
  Stats: 407 lines in 4 files changed: 407 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21335.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21335/head:pull/21335

PR: https://git.openjdk.org/jdk/pull/21335