[CentOS-devel] OpenShift Origin Docker files

Hi,
I just converted all the origin/images Dockerfiles to be rpm based,
instead of "build the binaries before you start" based.
These are in my fork of origin, in the 2016-centos-images branch.

https://github.com/tdawson/origin/tree/2016-centos-images/images

You will notice both Dockerfile, Dockerfile.original, and Dockerfile.centos.

Dockerfile and Dockerfile.centos should be the same.
Dockerfile.original is the original Dockerfile from OpenShift Origin.

As an extra bonus, I wrote README.image.order.md

https://github.com/tdawson/origin/blob/2016-centos-images/images/README.image.order.md

https://raw.githubusercontent.com/tdawson/origin/2016-centos-images/images/README.image.order.md

That gives a human readable image dependency list, as well as a quick and dirty
"Cut and paste this and you'll build all the OpenShift Origin images,
in the right order"

Troy