Add basic Python 3 tests

This uses `nose' to load and run tests for the time being, as
testrepository tries to load everything, which is not possible
currently. Until everything is Python 3 compatible, using `nose' will be
simpler to list the specific files we want to run.

Blueprint: make-python3-compatible

Change-Id: I4c8dbf11ac8c6e0f25bc60a3e880a30bf87a60bd
Signed-off-by: Julien Danjou <julien@danjou.info>

tests/unit/test_eventlet_backdoor.py

@@ -21,7 +21,6 @@ import errno
 import socket
 
 import eventlet
-import mox
 
 from openstack.common import eventlet_backdoor
 from openstack.common.fixture import config
@@ -56,7 +55,7 @@ class BackdoorPortTest(test.BaseTestCase):
         eventlet.listen(('localhost', 8800)).AndReturn(self.sock)
         self.sock.getsockname().AndReturn(('127.0.0.1', 8800))
         eventlet.spawn_n(eventlet.backdoor.backdoor_server, self.sock,
-                         locals=mox.IsA(dict))
+                         locals=moxstubout.mox.IsA(dict))
         self.mox.ReplayAll()
         port = eventlet_backdoor.initialize_if_enabled()
         self.assertEqual(port, 8800)

tests/unit/test_loopingcall.py

@@ -15,7 +15,7 @@
 import datetime
 
 from eventlet import greenthread
-import mox
+from six.moves import mox  # noqa
 
 from openstack.common import loopingcall
 from openstack.common import test