Add ansible module tripleo_ovn_mac_addresses. This
module will replace the following tripleo-heat-templates
resources:
OS::TripleO::OVNMacAddressNetwork
OS::TripleO::OVNMacAddressPort
Also update the tripleo_hieradata 'ovn_chassis_mac_map.j2'
template.
Implements: blueprint network-data-v2-ports
Change-Id: I0bc9c180b6a6cb70d32005e9528cf1b16c861ea8