24 Test Step Verdict Conditions

• Added initial support for verdict conditions.
• Implementation is still not complete.
• Added a few unit tests to show that it works as intended.
• It needs to be considered how it should work with Parallel step as well and in general, how should the behavior be here? I think the child steps of parallel steps should run to completion even though one step has a abort verdict.
• Defer has some issues with the initially suggested implementations. What to do with the deferred call in relation to break/retry?

Closes #24 (closed)

NOTE The behavior has been changed. We no longer support retry inside the Break Conditions enum!