In order for automated image builds to run, create
this script that can be called from magnum jobs, to
install needed dependencies for diskimage-builder
and fedora-atomic builds.
That script will be run on the VM that will be
spinned to run the image builds, targetted for ubuntu-trusty.
Change-Id: Icf5a2c79e47e632be2ac49bc9ccc528b4f604eb2
Implements blueprint fedora-atomic-image-build