Running:
$ openstack tripleo container image prepare default \
--output-env-file prepare-default.yaml \
--local-push-destination
$ openstack tripleo container image prepare -e prepare-default.yaml
Will read a Heat template with ContainerImagePrepare, prepare containers
and upload to a registry if needed.
The idea is to replace the other commands used by the overcloud for any
use case: undercloud, overcloud or any cloud.
One of the goals here is to execute this process before starting the
containers while deploying OpenStack on any cloud.
Change-Id: Ie4b7951147f5a1aec654982e21296a749fdd865c
Blueprint: container-prepare-workflow