fedora-atomic: split out kickstarts to fix vagrant
    
    In the vagrant kickstarts we had something like
    
     %include fedora-atomic-vagrant.ks
     %include fedora-atomic-updates.ks
    
    but both fedora-atomic-updates.ks and fedora-atomic-vagrant.ks
    included fedora-atomic.ks which means we got duplicate things
    in the flattened ks and we get errors. This splits it out a bit
    farther so we don't get duplicates.