RFR: 8354163: Open source Swing tests Batch 1 [v2]

[Jayathirth D V]

> Few Swing AbstractButton, JList and JMenu tests are open sourced.

Jayathirth D V has updated the pull request incrementally with one additional commit since the last revision:

  Update after review comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24650/files
  - new: https://git.openjdk.org/jdk/pull/24650/files/b9d1c4d6..442353fd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24650&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24650&range=00-01

  Stats: 61 lines in 4 files changed: 25 ins; 23 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/24650.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24650/head:pull/24650

PR: https://git.openjdk.org/jdk/pull/24650