Updates to tools/migrate_names.txt to correctly represent
mapping between neutron and networking-ovn.
networking_ovn/common/ovn_client.py neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py
networking_ovn/common/acl.py neutron/common/ovn/acl.py
doc/source/contributor/design doc/source/contributor/internals/ovn
Change-Id: Ib8973ee96431815377a36f85e2bef0ef87e96ca1