test_monthview_go_to_today_prev_month failed on mako #76

On image #76 this test failed with:

Traceback (most recent call last):
  File "/home/phablet/autopilot/calendar_app/tests/test_monthview.py", line 89, in test_monthview_go_to_today_prev_month
    self._go_to_today(-1)
  File "/home/phablet/autopilot/calendar_app/tests/test_monthview.py", line 79, in _go_to_today
    self._change_month(delta)
  File "/home/phablet/autopilot/calendar_app/tests/test_monthview.py", line 53, in _change_month
    Eventually(NotEquals(old_month)))
  File "/usr/lib/python3/dist-packages/testtools/testcase.py", line 406, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: After 10.0 seconds test failed: ==:
reference = datetime.datetime(2014, 6, 10, 0, 0, tzinfo=tzlocal())
actual = datetime.datetime(2014, 6, 10, 0, 0, tzinfo=tzlocal())

Which after examining the test I read as 'The month did not change to the previous month succesfully when I swiped on the month view'.

I was unable to reproduce this locally at all though, even with many reruns. This bug is primarily to track reoccurence in the CI system.