Engine: Clean-up of paths and references in the namespace, updating to Runcible
0.4.12 which requires Pulp 2.2.
Engine: Updates to pathing to support pulling the mediapath from
the first repository added to a Content View.
Engine: Adding creation of installation media at content view publish time
based upon repositories with distributions.
Engine: Attaching operatingsystem choice to the install media generated
at publish time.