Enabled Travis to use container-based infrastructure
Enabled Travis to use container-based infrastructure

haleystorm/gwt-leaflet,kengu/gwt-leaflet,haleystorm/gwt-leaflet,kengu/gwt-leaflet,haleystorm/gwt-leaflet,kengu/gwt-leaflet,kengu/gwt-leaflet,haleystorm/gwt-leaflet