Using the ViewTestBase.enable_routes in API tests causes the test_homeview to fail

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FAIL: Make sure the home view renders correctly.
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Traceback (most recent call last):
  File "/home/rharding/src/charmworld/charmworld/charmworld/views/tests/test_misc.py", line 64, in test_homeview
    self.fail('Cache-Control header not found.')
AssertionError: Cache-Control header not found.

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But only because of the tests in the api that enable routes. Comment out those tests and all passes. Move those tests until after the test_homeview and everything passes. Guilty code is in the tests:

def _setup_charm_with_icon(self, promulgated=False): ...