This resolves `Warning: validateDOMNesting(...): <form> cannot appear as a descendant of <form>.` warning in test output. There were two `<Form>` components nested in each other.
This commit introduces the user information step with the following fields:
(*) `userName` field
(*) `password` field
(*) add unit tests for create and edit mode
This commit adds a new step 'Users' that is enabled only in stage-preview,
and will enable it in stage-stable once IQE tests are ready.
The step is not functional yet, this is just the first step.
