Fixing error in readme
Fixing error in readme

Change-Id: Iaadaaf106d0448df98debf82474ee6cb972cc67d

openstack/tripleo-image-elements,radez/tripleo-image-elements,rdo-management/tripleo-image-elements,radez/tripleo-image-elements,rdo-management/tripleo-image-elements,openstack/tripleo-image-elements