Correct needs types in documentation

[elupus]

The documentation for needs type should match the default settings

[danwos]

I think we should not change it, as for instance test-file is written like this in the rest of the documentation as well.

The only problem I see: test_suite and test_case should be test-suite and `test-case.

What do you think?

[elupus]

I'm fine with that. But the docs elsewhere refer to these using those names. For example in test_suite.rst: "test-suite creates a need of type Test-Suite and adds the following options automatically:". Those should be changed to lowercase too in that case to make it consistent.