Use ubuntugis-unstable ppa in travis
Use ubuntugis-unstable ppa in travis

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