when I dont define this teardown, it gives me an AttributeError.

Traceback (most recent call last):
  File "/opt/otter/current/lib/python2.7/site-packages/cafe/drivers/unittest/fixtures.py", line 166, in tearDown
    self.test_metrics.timer.stop()
AttributeError: 'ScheduleScalingPolicyCronAndAtStyle' object has no attribute 'test_metrics'