[neutron] Transition networking-odl Ussuri to EOL

Hello Neutrinos:

Yesterday we found that we are still executing some periodic jobs for networking-odl in some stable releases. For the newer branches, we have proposed the corresponding patches to remove these zuul jobs [1][2]. The problem is in the Ussuri branch [3], which is completely broken (UTs, pep8, etc). This is why I'm proposing to transition it to EOL.

If you have any concerns, suggestions or questions, please let me know (via mail or IRC in the #openstack-neutron channel).

Regards.

[1]https://review.opendev.org/c/openstack/networking-odl/+/887080 [2]https://review.opendev.org/c/openstack/networking-odl/+/887077 [3]https://review.opendev.org/c/openstack/networking-odl/+/887076