Fix regression in container-puppet.py
Fix regression in container-puppet.py

Looks like we're logging a variable that's not defined. As we're
logging all hashes together for a container, there is no point
probably logging the config volumes.

Looks like a regression from https://review.opendev.org/683286

Change-Id: I3c36b1d6f8de28c956dd3f38285afd349062bc14
Closes-Bug: #1870351

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates