Add Test Failures to Scenario Properties

[dola]

In addition to locally logging test failures and errors, those should be automatically added to the properties of a scenarioo. This allows the user to see the test errors in the generated docu.

[bruderol]

I think that is currently allready done - but only the error message as the title of the step where it happens.

How it should be:

1. We should use a different field for that in the properties, only set the step name to a short error message
2. also on the scenario
3. stacktrace and other error info should be added