
First part of patchset: https://review.opendev.org/c/openstack/kolla-ansible/+/799229/ in which was suggested to split patch into smaller ones. This implements kolla_container_engine variable in command calls of docker,so later on it can be also used for podman without further change. Signed-off-by: Ivan Halomi <i.halomi@partner.samsung.com> Change-Id: Ic30b67daa2e215524096ad1f4385c569e3d41b95