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

[Andy Goryachev]

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

I am not using gradle to build in eclipse.  the expectation is that I can open apps project and it would at least compile.
but right now, even though the .project file in apps/ has no nature whatsoever, it seems to be compiled as java, or at least all java sources show errors.

Here is .project in apps/ :
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
        <name>apps</name>
        <comment></comment>
        <projects>
        </projects>
        <buildSpec>
        </buildSpec>
        <natures>
        </natures>
</projectDescription>

github ate the file.  here is the .project in apps/ after I merged your branch:

`<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
        <name>apps</name>
        <comment></comment>
        <projects>
        </projects>
        <buildSpec>
        </buildSpec>
        <natures>
        </natures>
</projectDescription>`

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