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

[Sergey Bylokhov]

On Wed, 9 Apr 2025 18:22:56 GMT, Phil Race <prr at openjdk.org> wrote:

>> Open source 4 Swing JProgressBar tests.
>
> Phil Race has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8353483

Marked as reviewed by serb (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/24517#pullrequestreview-2759079652