Update SOA serial.

    Argument:

        args: arguments object

def update_soa_serial(args):
    """Update SOA serial.

    Argument:

        args: arguments object
    """
    password = get_password(args)
    token = connect.get_token(args.username, password, args.server)
    soa_content = dict(domain=args.domain)
    if args.__dict__.get('mname'):
        soa_content['mname'] = args.mname
    if args.__dict__.get('rname'):
        soa_content['rname'] = args.rname
    if args.__dict__.get('refresh'):
        soa_content['refresh'] = args.refresh
    if args.__dict__.get('retry'):
        soa_content['retry'] = args.retry
    if args.__dict__.get('expire'):
        soa_content['expire'] = args.expire
    if args.__dict__.get('minimum'):
        soa_content['minimum'] = args.minimum
    processing.update_soa_serial(args.server, token, soa_content)