======================================================================
ERROR: Failure: ImportError (Class API cannot be found (Class API cannot be found (cannot import name log)))
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Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/nose/loader.py", line 390, in loadTestsFromName
    addr.filename, addr.module)
  File "/usr/lib/pymodules/python2.7/nose/importer.py", line 39, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/usr/lib/pymodules/python2.7/nose/importer.py", line 86, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/opt/stack/nova/nova/tests/test_misc.py", line 28, in <module>
    from nova import test
  File "/opt/stack/nova/nova/test.py", line 41, in <module>
    from nova.tests import fake_flags
  File "/opt/stack/nova/nova/tests/fake_flags.py", line 24, in <module>
    flags.DECLARE('compute_scheduler_driver', 'nova.scheduler.multi')
  File "/opt/stack/nova/nova/flags.py", line 52, in DECLARE
    __import__(module_string, globals(), locals())
  File "/opt/stack/nova/nova/scheduler/multi.py", line 27, in <module>
    from nova.scheduler import driver
  File "/opt/stack/nova/nova/scheduler/driver.py", line 24, in <module>
    from nova.compute import api as compute_api
  File "/opt/stack/nova/nova/compute/__init__.py", line 25, in <module>
    nova.flags.FLAGS.compute_api_class)
  File "/opt/stack/nova/nova/openstack/common/importutils.py", line 33, in import_class
    (class_str, str(exc)))
ImportError: Class API cannot be found (Class API cannot be found (cannot import name log))