Split out OVS/Linuxbridge agent configs from ml2_conf.ini

ansible/roles/neutron/defaults/main.yml

ansible/roles/neutron/tasks/config-neutron-fake.yml

ansible/roles/neutron/tasks/config.yml

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

ansible/roles/neutron/templates/ml2_conf.ini.j2

...roles/neutron/templates/neutron-linuxbridge-agent.json.j2

...eutron/templates/neutron-openvswitch-agent-xenapi.json.j2

...roles/neutron/templates/neutron-openvswitch-agent.json.j2

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

...e/roles/neutron/templates/openvswitch_agent_xenapi.ini.j2

doc/source/reference/networking/neutron.rst

...es/notes/split_ovs_lb_agents_config-96f1f90e7d678209.yaml