tell anaconda to leave firewall alone
    
    Take advantage of `firewall --use-system-defaults` [1]
    so that we can embed firewalld [2] but leave it disabled.
    
    [1] https://github.com/rhinstaller/anaconda/pull/1271
    [2] https://pagure.io/fedora-atomic/pull-request/103
    
    Signed-off-by: Dusty Mabe <dusty@dustymabe.com>