Build openstack cron jobs are failing. 

08:36:36 [builder-openstack-cron] $ /bin/bash -l /tmp/jenkins6691759394302043656.sh
08:36:36 ---> Cleanup old images
08:36:36 + lftools openstack --os-cloud vex image cleanup --days=30
08:36:39 AttributeError: 'Image' object has no attribute 'protected'
08:36:39 Build step 'Conditional steps (multiple)' marked build as failure