RFR: 8354214: Open source Swing tests Batch 2

[Jayathirth D V]

Few swing JList tests are open sourced.

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Commit messages:
 - 8354214: Open source Swing tests Batch 2

Changes: https://git.openjdk.org/jdk/pull/24588/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24588&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354214
  Stats: 339 lines in 3 files changed: 339 ins; 0 del; 0 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