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

In addition, now I'm getting an error on `apps/samples/3DViewer`: `The type java.lang.Class cannot be resolved. It is indirectly referenced from required .class files`

-------------

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