Reproduce a bug when a Child complex type is registered after its Parent (it's not actually).

wsme/tests/test_types.py

@@ -113,8 +113,11 @@ class TestTypes(unittest.TestCase):
         class Child(Parent):
             child_attribute = int
 
+        types.register_type(Parent)
         types.register_type(Child)
 
+        assert len(Child._wsme_attributes) == 2
+
     def test_selfreftype(self):
         class SelfRefType(object):
             pass