Resolve "fix documention on unit tests"
Description
This MR fixes the documentation regarding the unit tests (see issue #528 (closed)). The variable descriptions in the source code is updated, and a new category 'Unittests' is introduced.
News snippet
This MR fixes the documentation regarding the unit tests (see issue #528 (closed)).
Checklist
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I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.
Closes #528 (closed)
Edited by Martin Lueders