Comment 0 for bug 1984238

It seems the fix for https://bugs.launchpad.net/neutron/+bug/1980671 was incomplete.

In Puppet OpenStack job we observe the following WARNING when neutron-dynamic-routing is enabled

```
2022-08-10 01:35:26.723 102553 WARNING neutron.objects.base [None req-4a9650ba-3041-46db-98c1-af8c625df7c9 85c0a6ad83f24770b3cf565b324d33fd 414c0188246e442c8f0baf6ae86e1d7d - - default default] ORM session: SQL execution without transacti
on in progress, traceback:
  File "/usr/lib/python3.9/site-packages/eventlet/greenthread.py", line 221, in main
    result = function(*args, **kwargs)
  File "/usr/lib/python3.9/site-packages/eventlet/wsgi.py", line 837, in process_request
    proto.__init__(conn_state, self)
...
  File "/usr/lib/python3.9/site-packages/neutron/db/l3_dvr_db.py", line 1411, in update_floatingip
    old_floatingip, floatingip = self._update_floatingip(
  File "/usr/lib/python3.9/site-packages/neutron/db/l3_db.py", line 1519, in _update_floatingip
    registry.publish(
  File "/usr/lib/python3.9/site-packages/neutron_lib/callbacks/registry.py", line 54, in publish
    _get_callback_manager().publish(resource, event, trigger, payload=payload)
  File "/usr/lib/python3.9/site-packages/neutron_lib/db/utils.py", line 105, in _wrapped
    return function(*args, **kwargs)
  File "/usr/lib/python3.9/site-packages/neutron_lib/callbacks/manager.py", line 150, in publish
    errors = self._notify_loop(resource, event, trigger, payload)
  File "/usr/lib/python3.9/site-packages/neutron_lib/callbacks/manager.py", line 181, in _notify_loop
    callback(resource, event, trigger, payload=payload)
  File "/usr/lib/python3.9/site-packages/neutron_dynamic_routing/services/bgp/bgp_plugin.py", line 257, in floatingip_update_callback
    next_hop = self._get_fip_next_hop(
  File "/usr/lib/python3.9/site-packages/neutron_dynamic_routing/db/bgp_db.py", line 1090, in _get_fip_next_hop
    router = self._get_router(context, router_id)
  File "/usr/lib/python3.9/site-packages/neutron_dynamic_routing/db/bgp_db.py", line 1084, in _get_router
    router = model_query.get_by_id(context, l3_db.Router, router_id)
  File "/usr/lib/python3.9/site-packages/neutron_lib/db/model_query.py", line 169, in get_by_id
    return query.filter(model.id == object_id).one()
  File "/usr/lib64/python3.9/site-packages/sqlalchemy/orm/query.py", line 2865, in one
    return self._iter().one()
  File "/usr/lib64/python3.9/site-packages/sqlalchemy/orm/query.py", line 2903, in _iter
    result = self.session.execute(
  File "/usr/lib64/python3.9/site-packages/sqlalchemy/orm/session.py", line 1693, in execute
    result = fn(orm_exec_state)
```