RFR: 8289255: update Eclipse .classpath and other configuration files [v7]

[Nir Lisker]

On Wed, 6 Jul 2022 21:38:36 GMT, Andy Goryachev <duke at openjdk.org> wrote:

>> summary of changes:
>> - fixed .classpath files
>> - set UTF-8 encoding in the eclipse project config files
>
> Andy Goryachev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8289255: removed 3DViewer test folders from .classpath

If you want to used Buildship in your projects, you need to import them as gradle projects. This will add the gradle nature to them. Here are the instructions: https://wiki.openjdk.org/display/OpenJFX/Using+an+IDE#UsinganIDE-UsingEclipse

The problem is that not everyone will want to use Buildship, so the .project files will be different. We will need to think what to do about that. Maybe even if there is the gradle nature in a project file and Buildship isn't installed, then Eclipse will just ignore it, which will be ideal, but maybe it will give errors.

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PR: https://git.openjdk.org/jfx/pull/804