We aimed to create rhel 7.x machine image with use of minimum resources (using m1.micro flavor) that would be running/executing jenkins job itself (initiating machines, pulling from git, etc.) . Such image requires only basic configuration, not usually used jbds label while being provisioned with mwqa-cloud-slaves scripts. So we used empty/no label but no default labels as one would expect from this script were executed. There is the missing use of IMAGE_LABELS env.: https://gitlab.mw.lab.eng.bos.redhat.com/dev-platform/mwqa-cloud-slaves/blob/master/bin/provision.sh#L172.