The unification of docker files involve an update of the documentation
files in order to be consistent.
Basically the new process involves the creation of just one Docker image.
This image has to be able to do all different ISO creation steps.
- Mirror creation.
- Packages building.
- ISO image creation.
Story: 2003712
Task: 226370
Depends-On: https://review.openstack.org/#/c/601307/
Change-Id: Ied1673e039b04777c39eb3814fbd331dd50a7860
Signed-off-by: Mario Alfredo Carrillo Arevalo <mario.alfredo.c.arevalo@intel.com>