RFR: 8346828: javax/swing/JScrollBar/4865918/bug4865918.java still fails in CI [v2]

[Alisen Chung]

On Tue, 7 Jan 2025 08:48:24 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> Test seems to still fail in CI in ubuntu22.04 intermittently even after [JDK-8346324](https://bugs.openjdk.org/browse/JDK-8346324). Made the test headless similar to javax/swing/JScrollBar/bug4842792.java.
>
> Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove import/var

this test is failing for me locally on macOS with the same error `Execution failed: 'main' threw exception: java.lang.RuntimeException: The scrollbar block increment is incorrect
`

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PR Review: https://git.openjdk.org/jdk/pull/22937#pullrequestreview-2535565999