Make sure the Python venv is using Python 2
Make sure the Python venv is using Python 2

Things end badly (in load_input_model.py) if using Python 3.

Signed-off-by: Nicolas Bock <4ad6fd604400c7892c7a2cb53bf674987bcaa405@suse.com>

SUSE-Cloud/automation,gosipyan/automation,gosipyan/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,aspiers/automation,aspiers/automation,gosipyan/automation,gosipyan/automation,aspiers/automation