def on_teardown(self, app, task=None):
    for session, options in self._sessions.values():
      self._teardown_handler(session, app, options)
Retrieve known local work directory and biodata directories as baselines for buckets.
dataset/ETHPy150Open mtth/kit/kit/base.py/Kit.on_teardown--crossover with--dataset/ETHPy150Open chapmanb/bcbio-nextgen-vm/bcbiovm/ship/pack.py/_get_known_dirs