Rename Tests to Base_Tests to be more descriptive

[radeusgd]

Pull Request Description

• All of our test projects contain the name of the module they are testing, except for Tests which sounds very generic and sounds like it could contain really anything. Now this is 'fixed' by ensuring the name reflects the module being tested - Base.

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• All code has been tested:
  • Unit tests have been written where possible.
  • If GUI codebase was changed, the GUI was tested when built using ./run ide build.

[JaroslavTulach]

Just today I was dreaming of moving the tests next to the sources of the module. E.g. distribution/lib/Standard/Base/0.0.0-dev/test/ directory and running them with enso --test distribution/lib/Standard/Base/0.0.0-dev/ command.

Renaming seems to cause no harm.