
Added four new network agent types to the list method filter: * ``ovn-controller`` * ``ovn-controller-gateway`` * ``ovn-metadata`` * ``ovn-agent`` These agents are represented in the OVN network agent classes defined in [1]. The OVN agent names are defined in [2]. [1]86f94de99a/neutron/plugins/ml2/drivers/ovn/agent/neutron_agent.py
[2]86f94de99a/neutron/common/ovn/constants.py (L91-L94)
Closes-Bug: #2097124 Change-Id: I117be7e60f67fdd94677cbaa65a3aff01e57bb5e