Comment 1 for bug 1839165

I think the problem here is that neutron-dynamic-routing switched from using ryu to os-ken (a fork of ryu). The config option bgp_speaker_driver is set in kolla-ansible to ryu, but it is not included in requirements.txt. We should just use the default of os-ken.

https://docs.openstack.org/neutron-dynamic-routing/latest/contributor/dragent-drivers.html#bgp-driver