RFR: 8353557: Skip some system tests on Linux

[Kevin Rushforth]

On Fri, 4 Apr 2025 10:16:18 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

> Under https://bugs.openjdk.org/browse/JDK-8339679 task, we are running full tests and identifying issues for Ubuntu 24.04.
> 
> As part of above task 6 test failures were identified and looks like these test failures are happening because of product issues in Ubuntu24.04.
> 
> Test failures are:
> 1) RestoreSceneSizeTest and its product issue : [JDK-8353556](https://bugs.openjdk.org/browse/JDK-8353556)
> 2) PageFillTest  and its product issue : [JDK-8353561](https://bugs.openjdk.org/browse/JDK-8353561)
> 3) SizeToSceneTest and its product issue : [JDK-8353612](https://bugs.openjdk.org/browse/JDK-8353612)
> 4) WrongStageFocusWithApplicationModalityTest fails intermittently only in Wayland and its product issue : [JDK-8353643](https://bugs.openjdk.org/browse/JDK-8353643)
> 5) InitializeJavaFXLaunch1Test & InitializeJavaFXLaunch2Test fails intermittently only in Xorg and its product issue : [JDK-8353644](https://bugs.openjdk.org/browse/JDK-8353644)
> 
> As part of test stabilization task these identified test failures will be skipped and we have product issues raised for them.
> 
> I tried finding ways to add utility to skip tests only in Ubuntu 24.04. System.Properties doesn't list any item which can be used to identified a specific Linux distro or Ubuntu version. If we need to identify Ubuntu and its version we need to use executable like `lsb_release`. 
> 
> So test which are failing in both Wayland & Xorg are skipped for Linux platform and if they fail with specific windowing system(Wayland/Xorg) they are skipped only under them.

Sanity test passed.

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Marked as reviewed by kcr (Lead).

PR Review: https://git.openjdk.org/jfx/pull/1762#pullrequestreview-2743149663