An idea for a future improvement I would like to see as we move in
this direction is to switch from reading the container startup configs
from a single file per step
(/var/lib/tripleo-config/container-startup-config-step_{{ step
}}.json), to using a directory per step instead. It would look
something like:

/var/lib/tripleo-config/container-startup-config/step1
/var/lib/tripleo-config/container-startup-config/step1/keystone-init-tasks.json
/var/lib/tripleo-config/container-startup-config/step1/pacemaker-init-tasks.json
etc.