Move manipulation of machine-id above systemd-tmpfiles
    
    For complicated reasons the systemd-tmpfiles call acutally
    fails and causes the rest of the kspost to not get run. This
    commit makes it the last thing to get run.
    
    This has been fixed in future branches with a more complicated
    set of patches:
    
    - https://pagure.io/fedora-kickstarts/c/a4ae071
    - https://pagure.io/fedora-kickstarts/c/f6ecdc3
    
    Signed-off-by: Dusty Mabe <dusty@dustymabe.com>