Add OVN_BRIDGE_Mappings - Additional bridge support is required.

[howon park]

Hi,

Add OVN_BRIDGE_Mappings - Additional bridge support is required.
cannot modify the value of the ovn-bridge-mappings in kolla.
Physical network name changes may be required for reasons such as adding a provider or classifying it.
In kolla, however, it is set to a fixed value of physnet.
Please open up the possibilities for the need to change

    ovn_mappings: "{% for bridge in neutron_bridge_name.split(',') %}physnet{{ loop.index0 + 1 }}:{{ bridge }}{% if not loop.last %},{% endif %}{% endfor %}"
    ovn_macs: "{% for bridge in neutron_bridge_name.split(',') %}physnet{{ loop.index0 + 1 }}:{{ ovn_base_mac | random_mac(seed=inventory_hostname+bridge) }}{% if not loop.last %},{% endif %}{% endfor %}"

It seems to be supported by Triple-O or Openstack ansible

Kolla-ansible version 15.0.0/zed

Thanks!