RFR: 8224261: JProgressBar always with border painted around it [v2]

[Abhishek Kumar]

On Thu, 16 Nov 2023 06:50:36 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> I couldn't understand. Can you please explain a bit more?
>
> It is not necessary to add the progress bar to the frame and then capture the pixels by the robot. you can render content of the progress bar directly to the BufferedImage.

@mrserb @aivanov-jdk Updated the test to render component to `BufferedImage` directly.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16467#discussion_r1397442893