RFR: 8353483: Open source some JProgressBar tests [v3]

[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

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24517/files
  - new: https://git.openjdk.org/jdk/pull/24517/files/5e9e7348..829199d2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24517&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24517&range=01-02

  Stats: 8 lines in 3 files changed: 0 ins; 2 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