Code review comment for lp:~macslow/unity8/shellRotation

Trying to run the rotation tests from demo-stuff PPA gets me:
traceback-3: {{{
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/unity8/shell/tests/test_rotation.py", line 86, in test_rotation_with_webbrowser_app
    self.useFixture(unity_with_sensors)
  File "/usr/lib/python3/dist-packages/testtools/testcase.py", line 645, in useFixture
    fixture.setUp()
  File "/usr/lib/python3/dist-packages/unity8/fixture_setup.py", line 75, in setUp
    self._create_sensors()
  File "/usr/lib/python3/dist-packages/unity8/fixture_setup.py", line 152, in _create_sensors
    process_helpers.get_unity_pid())
AttributeError: 'module' object has no attribute 'get_unity_pid'
}}}

And 8 failures.