RFR: 8292848: AWT_Mixing and TrayIcon tests fail on el8 with hard-coded isOel7

[KIRIYAMA Takuya]

On Wed, 24 Aug 2022 07:06:15 GMT, KIRIYAMA Takuya <duke at openjdk.org> wrote:

> Could you please review the JDK-8292848 bug fixes?
> The purpose of the isOel7 method is to detect differences in GNOME version changes, and the isOel7 
> result should be true after version 8.
> I modified the isOel7 method to use regular expressions instead of hard-coded versions to be able to 
> detect the new os version.
> I also changed the method name to match the new conditions.

Thank you for your support.

@mrserb 
If @prrace cannot be sponsor, could you sponsor this pull request, please?

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PR: https://git.openjdk.org/jdk/pull/9995