NOTE: This is the first patch of many to migrate the ML2/OVN jobs
in this repository.
Jobs migrated:
* neutron-tempest-plugin-ovn
* neutron-tempest-plugin-ovn-enforce-scope-old-defaults
Related-Bug: #2069581
Related-Bug: #2069831
Topic: eventlet-deprecation
Change-Id: I86a3fc753292ae10e88102347d32db75c48ab865