fuelweb tests fail on import of test_mongo_multirole

[Roman Podoliaka]

When running tests there is the following traceback:

+ python fuelweb_test/run_tests.py -q --nologcapture --with-xunit --group=bvt_2
Traceback (most recent call last):
  File "fuelweb_test/run_tests.py", line 178, in <module>
    import_tests()
  File "fuelweb_test/run_tests.py", line 96, in import_tests
    from tests.tests_multirole import test_mongo_multirole # noqa
  File "/home/jenkins/workspace/8.0-pkg-systest-ubuntu/fuel-qa/fuelweb_test/tests/tests_multirole/test_mongo_multirole.py", line 25, in <module>
    class MongoMultirole(TestBasic):
  File "/home/jenkins/workspace/8.0-pkg-systest-ubuntu/fuel-qa/fuelweb_test/tests/tests_multirole/test_mongo_multirole.py", line 30, in MongoMultirole
    @log_snapshot_after_test
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/proboscis/decorators.py", line 121, in cb_method
    return DEFAULT_REGISTRY.register(home_2, **kwargs)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/proboscis/core.py", line 329, in register
    info = TestEntryInfo(**kwargs)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/proboscis/core.py", line 86, in __init__
    for target in depends_on_list)
TypeError: 'instancemethod' object is not iterable

[Roman Podoliaka (rpodolyaka)]

Fixed in https://review.openstack.org/#/q/Icfd1e1e2bb8b5a355df4d2d76ec8455281557da3