Fix Invalid() exception msg
resource.obj_name() is method, so in case of setting it as bound would
result in following message in the raised error [1]
[1]
@@ -791,7 +791,7 @@ class VolumeManager(manager.CleanableManager,
if res_backend != backend:
msg = (_('Invalid %(resource)s: %(resource)s %(id)s is not '
'local to %(backend)s.') %
- {'resource': resource.obj_name, 'id': resource.id,
+ {'resource': resource.obj_name(), 'id': resource.id,
'backend': backend})
raise exception.Invalid(msg)
