Handle TaskTerminated on child workflows?

[ybastide]

In the main workflow:

Traceback:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/simpleflow/swf/executor.py", line 846, in replay
    result = self.run_workflow(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/simpleflow/executor.py", line 70, in run_workflow
    result = self._workflow.run(*args, **kwargs)
...
    future = self.submit(submittable, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/simpleflow/workflow.py", line 59, in submit
    return self._executor.submit(submittable, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/simpleflow/swf/executor.py", line 799, in submit
    return self.resume(a_task, *a_task.args, **a_task.kwargs)
  File "/usr/local/lib/python2.7/dist-packages/simpleflow/swf/executor.py", line 705, in resume
    future = ttf(self, a_task, event)
  File "/usr/local/lib/python2.7/dist-packages/simpleflow/swf/executor.py", line 575, in resume_child_workflow
    raise future.exception
TaskTerminated