Deploy neutron-mlnx-agent and neutron-eswitchd containers

ansible/group_vars/all.yml

ansible/roles/neutron/defaults/main.yml

ansible/roles/neutron/handlers/main.yml

ansible/roles/neutron/tasks/config.yml

ansible/roles/neutron/templates/eswitchd.conf

ansible/roles/neutron/templates/mlnx_agent.ini.j2

ansible/roles/neutron/templates/neutron-eswitchd.json.j2

ansible/roles/neutron/templates/neutron-mlnx-agent.json.j2

ansible/roles/nova-cell/templates/libvirtd.conf.j2

doc/source/reference/networking/neutron.rst

releasenotes/notes/neutron-mlnx-agent-3e7b3aecbb298811.yaml