Add one more step to generate kolla-build.conf file
Add one more step to generate kolla-build.conf file

Change-Id: Ieaa516c8f18d42d0a8fd3f65ad6cf0b88d9c49ef
Closes-Bug: #1744453

rahulunair/kolla,openstack/kolla,stackforge/kolla,stackforge/kolla,openstack/kolla,rahulunair/kolla,stackforge/kolla