neutron functional tests break with oslo.utils 3.39.1 and above (https://bugs.launchpad.net/neutron/+bug/1812922) => oslo.utils patch is on its way, in requirements
the wrong oslo.utils versions were blacklisted.
Functional test neutron.tests.functional.services.portforwarding.test_port_forwarding.PortForwardingTestCase.test_concurrent_create_port_forwarding_delete_port fails (https://bugs.launchpad.net/neutron/+bug/1813540)