Remove deprecated image build argument
Remove deprecated image build argument

Removed deprecated argument when building
images for RDO [1]

[1] https://review.openstack.org/#/c/385530/

Change-Id: Iaa555bbfef9dd36a3b2a90e596df875724049dea

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared