Comment 1 for bug 1700766

This looks more like a feature than bug.

I agree that this can be quite convenient, however I would suggest few things about implementation here:

1) Use token per subtask (not task)
2) Implement Context that generates and caches tokens in context object for every user
3) Modify base OpenStackScenario to check whatever token exists
4) Modify OSClients to accept tokens

So that is possible to implement.
Would you like to try?