Upgrade Celery to 3.1.13 (security fix)
Upgrade Celery to 3.1.13 (security fix)

jphnoel/udata,jphnoel/udata,etalab/udata,etalab/udata,opendatateam/udata,davidbgk/udata,davidbgk/udata,grouan/udata,etalab/udata,opendatateam/udata,opendatateam/udata,grouan/udata,davidbgk/udata,jphnoel/udata,grouan/udata