testsuite is sensitive to the local timezone

[Paul Collins]

[agnew(juju-upgrader)] TZ=UTC make test
python3 -m unittest unit_tests/*.py
................................................................................................................
----------------------------------------------------------------------
Ran 112 tests in 0.079s

OK
[agnew(juju-upgrader)] date -R
Fri, 10 Aug 2018 14:12:39 +1200
[agnew(juju-upgrader)] make test
python3 -m unittest unit_tests/*.py
.....................................................FF.FFF.....................................................
======================================================================
FAIL: test__get_juju_agent_status (unit_tests.test_juju_status.TestJujuStatus)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/paul/build/canonical/juju/juju-upgrader/unit_tests/test_juju_status.py", line 60, in test__get_juju_agent_status
    self.status['applications']['apache2']['units']['apache2/0']), expected_juju_agent_status)
AssertionError: {'current': 'idle', 'since': '04 Jan 2018 0[53 chars]28.0} != {'agent-time': 1515057028.0, 'current': 'id[53 chars]2.8'}
- {'agent-time': 1515053428.0,
? ^^

+ {'agent-time': 1515057028.0,
? ^^

   'current': 'idle',
   'since': '04 Jan 2018 09:10:28Z',
   'version': '2.2.8'}

======================================================================
FAIL: test__get_machines (unit_tests.test_juju_status.TestJujuStatus)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/paul/build/canonical/juju/juju-upgrader/unit_tests/test_juju_status.py", line 50, in test__get_machines
    self.assertEqual(list(juju_status._get_machines(self.status)), expected_machines)
AssertionError: Lists differ: [{'unit': '0', 'current': 'started', 'since': '02 Jan 201[308 chars]WN'}] != [{'unit': '0', 'version': '2.2.8', 'since': '02 Jan 2018 [308 chars]ed'}]

First differing element 0:
{'unit': '0', 'current': 'started', 'since': '02 Jan 201[121 chars]2.8'}
{'unit': '0', 'version': '2.2.8', 'since': '02 Jan 2018 [121 chars]ted'}

- [{'agent-time': 1514920992.0,
? ^^

+ [{'agent-time': 1514924592.0,
? ^^

    'current': 'started',
    'model': 'mojo-dot-canonical-dot-com',
    'model-version': '2.2.8',
    'since': '02 Jan 2018 20:23:12Z',
    'unit': '0',
    'version': '2.2.8'},
- {'agent-time': 1514920992.0,
? ^^

+ {'agent-time': 1514924592.0,
? ^^

    'current': 'started',
    'model': 'mojo-dot-canonical-dot-com',
    'model-version': '2.2.8',
    'since': '02 Jan 2018 20:23:12Z',
    'unit': '1',
    'version': 'UNKNOWN'}]

======================================================================
FAIL: test__get_model_machines (unit_tests.test_juju_status.TestJujuStatus)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/paul/build/canonical/juju/juju-upgrader/unit_tests/test_juju_status.py", line 289, in test__get_model_machines
    self.assertTrue(model in actual_model_machines[index])
AssertionError: False is not true

======================================================================
FAIL: test__get_unit (unit_tests.test_juju_status.TestJujuStatus)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/paul/build/canonical/juju/juju-upgrader/unit_tests/test_juju_status.py", line 85, in test__get_unit
    self.assertEqual(actual_unit, expected_unit)
AssertionError: {'unit': 'apache2/0', 'current': 'idle', 's[183 chars]2.8'} != {'agent-time': 1515057028.0, 'current': 'id[183 chars]2.8'}
- {'agent-time': 1515053428.0,
? ^^

+ {'agent-time': 1515057028.0,
? ^^

   'current': 'idle',
   'machine': '0',
   'machine-version': '2.2.8',
   'model': 'mojo-dot-canonical-dot-com',
   'model-version': '2.2.8',
   'since': '04 Jan 2018 09:10:28Z',
   'unit': 'apache2/0',
   'version': '2.2.8'}

======================================================================
FAIL: test__get_units (unit_tests.test_juju_status.TestJujuStatus)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/paul/build/canonical/juju/juju-upgrader/unit_tests/test_juju_status.py", line 201, in test__get_units
    self.assertTrue(unit in actual_units)
AssertionError: False is not true

----------------------------------------------------------------------
Ran 112 tests in 0.081s

FAILED (failures=5)
Makefile:12: recipe for target 'test' failed
make: *** [test] Error 1
[agnew(juju-upgrade)] _