RFR: 8354214: Open source Swing tests Batch 2 [v2]

[Jayathirth D V]

> Few swing JList tests are open sourced.

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

  Update after review

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24588/files
  - new: https://git.openjdk.org/jdk/pull/24588/files/8f8cb349..93791b9a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24588&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24588&range=00-01

  Stats: 13 lines in 2 files changed: 3 ins; 2 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/24588.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24588/head:pull/24588

PR: https://git.openjdk.org/jdk/pull/24588