Idea: the commander should be able to run scenario's concurrently

[stefanooldeman]

At this moment each scenario item in the spec is executed sequentially by pyrandall/commander.py.

Specs can "validate" that an event is received (consumed) within a certain time after producing. If the specified waiting time is significant, then the total execution time accumulates.

Also we should take into account that processing data with a timely manner often plays an important role in streaming architectures.

If anyone wishes to pick this up please discuss.

[stefanooldeman]

Update: next candidate for development. Will build a POC and propose changes