The report step should be executed upon errors

[psss]

Currently, if a failure happens during the provision, prepare and execute steps, the rest of the steps is skipped, except for finish which takes care of guest cleanup. There might be partial test results (if the failure happened in the middle of the execute step) but user does not get any because the report step is skipped completely.

Let's run the report step always (if enabled) and include all completed test results. For tests which were not executed we should probably report skip or error as the result.

[psss]

This is an important issue blocking full tier testing, proposing for 1.41.