Incorrect type resolving when alias name matches file name

[konradweiss]

We encountered the case where the import alias used is the same as the name of the file and therefore the namespace. One Example:
File: openstack/cinder-25.0.0/cinder/objects/base.py

from oslo_versionedobjects import base
...
class ObjectListBase(base.ObjectListBase):

For now we prevent the creation of a harmfull loop in the type hierarchy. However, here we need to fix the underlying Issue.