Restructure Application Deployment Trace

[thschue]

To make the deployment trace better readable, it should be restructured and look as follows in the future:

Furthermore, Task and evaluation results should be represented in the Trace to see the following information:

• What has been executed, and evaluated?
• What was the result?
• Why did it fail?

Definition of done

• Application Deployment Trace is generated as defined above
• Getting started (if finished until then) and documentation is adapted

#388 (comment)

[AloisReitbauer]

LGTM. We should also a specific type for the traces so people can distinguish them from "regular" application traces.

Also we might get back some of the semantics of the Keptn events as well.

Overall, this will be much better than the current span naming