Add Ironic Python Agent builder

This patch will build and upload the files required to boot the
Ironic Python Agent ramdisk using CoreOS and a Docker container.
The Ironic Python Agent is one of the methods to provision servers
in Ironic. This will make testing the agent much easier.

Change-Id: I34ea9a196c5ac1954a4ebd6d27850f6b6e56afa7
Co-Authored-By: Jay Faulkner <jay@jvf.cc>