Operator: find-next-participation

Problem space: top-ps
Operator Overview:
This operator sets the task of finding the next step the NTD has a role in.

Operator Proposal:
It is proposed whenever the NTD is trying to launch the space shuttle and has no other task.

Operator Application:
It is implemented by the find-next-participation problem space.

Operator Reconsider:
Reconsidered if a task is posted.
Proposed in the top space (in file launch.soar6), but implemented by the in: find-next-participation.soar6