Test is broken: snapcraft.tests.sources.test_subversion.SubversionDetailsTestCase.test_svn_details_commit

[Facundo Batista]

Checking from master with all the indicated dependencies, and running from inside the venv, I get:

$ ./runtests.sh unit
...
...
...
======================================================================
FAIL: test_svn_details_commit (snapcraft.tests.sources.test_subversion.SubversionDetailsTestCase)
snapcraft.tests.sources.test_subversion.SubversionDetailsTestCase.test_svn_details_commit
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testtools.testresult.real._StringException: Empty attachments:
  pythonlogging:''

Traceback (most recent call last):
  File "/home/facundo/canonical/snappy/snapcraft/snapcraft/tests/sources/test_subversion.py", line 173, in test_svn_details_commit
    self.assertEqual(self.expected_commit, self.source_details['commit'])
  File "/home/facundo/canonical/snappy/snapcraft/env/lib/python3.5/site-packages/testtools/testcase.py", line 411, in assertEqual
    self.assertThat(observed, matcher, message)
  File "/home/facundo/canonical/snappy/snapcraft/env/lib/python3.5/site-packages/testtools/testcase.py", line 498, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: '1' != None

----------------------------------------------------------------------
Ran 1435 tests in 386.980s

FAILED (failures=1)