Example:
terraformer import openstack --resources=compute,networking --regions=RegionOne
List of supported OpenStack services:
blockstorage
openstack_blockstorage_volume_v1
openstack_blockstorage_volume_v2
openstack_blockstorage_volume_v3
compute
openstack_compute_instance_v2
networking
openstack_networking_secgroup_v2
openstack_networking_secgroup_rule_v2