RFR: 8353483: Open source some JProgressBar tests [v4]

[Phil Race]

> Open source 4 Swing JProgressBar tests.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8353483

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24517/files
  - new: https://git.openjdk.org/jdk/pull/24517/files/829199d2..e9ab5712

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24517&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24517&range=02-03

  Stats: 6 lines in 2 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/24517.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24517/head:pull/24517

PR: https://git.openjdk.org/jdk/pull/24517