RFR: 8352997: Open source several Swing JTabbedPane tests

[Phil Race]

open sourcing some Swing JTabbedPane tests

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Commit messages:
 - 8352997
 - 8352997

Changes: https://git.openjdk.org/jdk/pull/24370/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24370&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352997
  Stats: 470 lines in 6 files changed: 470 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24370.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24370/head:pull/24370

PR: https://git.openjdk.org/jdk/pull/24370