Fixed missing default argument in billing_plans creation method (post)
Fixed missing default argument in billing_plans creation method (post)

kinnou02/navitia,pbougue/navitia,kinnou02/navitia,antoine-de/navitia,CanalTP/navitia,patochectp/navitia,TeXitoi/navitia,Tisseo/navitia,kadhikari/navitia,lrocheWB/navitia,lrocheWB/navitia,kinnou02/navitia,kadhikari/navitia,CanalTP/navitia,kinnou02/navitia,Tisseo/navitia,kadhikari/navitia,TeXitoi/navitia,antoine-de/navitia,xlqian/navitia,patochectp/navitia,ballouche/navitia,TeXitoi/navitia,pbougue/navitia,xlqian/navitia,xlqian/navitia,CanalTP/navitia,xlqian/navitia,antoine-de/navitia,lrocheWB/navitia,CanalTP/navitia,patochectp/navitia,TeXitoi/navitia,ballouche/navitia,prhod/navitia,Tisseo/navitia,prhod/navitia,ballouche/navitia,kadhikari/navitia,patochectp/navitia,pbougue/navitia,CanalTP/navitia,antoine-de/navitia,pbougue/navitia,prhod/navitia,prhod/navitia,Tisseo/navitia,lrocheWB/navitia,Tisseo/navitia,xlqian/navitia,ballouche/navitia