Revert "Revert "Add environment variables for better var handling""
Revert "Revert "Add environment variables for better var handling""

This reverts commit 6aa5a92e353ee6c5af87ad0c8efd6839f833626b.

We'd like to disable the fact var inject but we need to address the
ceph-ansible execution issues. This change now has depends-on for CI
coverage and a workaround for ceph-ansible requirements until
ceph-ansible can be updated.

Depends-On: https://review.opendev.org/c/openstack/tripleo-ci/+/778712
Depends-On: https://review.opendev.org/c/openstack/tripleo-ansible/+/778553

Change-Id: Ia67f51097e7853a5810217a3effc37c45b010f3c
Related-Bug: #1915761

openstack/python-tripleoclient