Fix container-puppet tool standalone for podman
Fix container-puppet tool standalone for podman

Do not repeat volume mounts twice, do not use network, when it is not
required. Make podman CLI happy with defaults, when running the tool
with a minimalistic environment, like:

STEP=2 DEBUG=true CONFIG=foo-tasks.json ./common/container-puppet.py

Change-Id: I8392dc3452ff71bf9ae4aea7ef36a26ffca9b5fe
Signed-off-by: Bogdan Dobrelya <a2228ae37d00d1cbd5a93e53f3e1e5aef21d5900@redhat.com>

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