Log the raised message when DNS check_zone_overlap fails
    
    The check can fail for a lot of other reasons than there is
    overlap so the error should be logged.
    
    This causes confusion when --auto-reverse is requested and
    some lookup fails causing the reverse to not be created.
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Francois Cami <fcami@redhat.com>