Variable files: "-e @/etc/openstack_deploy/user_secrets.yml -e @/etc/openstack_deploy/user_variables.yml "
ERROR: Inventory script (inventory/dynamic_inventory.py) had an execution error: Traceback (most recent call last):
  File "/opt/openstack-ansible/playbooks/inventory/dynamic_inventory.py", line 1000, in <module>
    main()
  File "/opt/openstack-ansible/playbooks/inventory/dynamic_inventory.py", line 957, in main
    user_defined_config
  File "/opt/openstack-ansible/playbooks/inventory/dynamic_inventory.py", line 650, in container_skel_load
    value.get('properties')
  File "/opt/openstack-ansible/playbooks/inventory/dynamic_inventory.py", line 342, in _add_container_hosts
    assignment,
  File "/opt/openstack-ansible/playbooks/inventory/dynamic_inventory.py", line 154, in _build_container_hosts
    container_mapping = inventory[container_type]['children']
KeyError: 'children'