/kind feature

I am noticed that openstack-client supports multi-region config. https://github.com/gophercloud/utils/blob/master/openstack/clientconfig/testing/clouds.yaml#L160-L171

What do you think to add the multi-region support in one OCCM, based on the config-file, after #1900 ?
If the config file has a regions tree, OCCM checks it at boot time and will watch the nodes in those regions.