[importer] Make DataImport success status be true if all files were successfully imported
[importer] Make DataImport success status be true if all files were successfully imported

splashblot/dronedb,DigitalCoder/cartodb,raquel-ucl/cartodb,bloomberg/cartodb,UCL-ShippingGroup/cartodb-1,future-analytics/cartodb,future-analytics/cartodb,nuxcode/cartodb,bloomberg/cartodb,thorncp/cartodb,thorncp/cartodb,DigitalCoder/cartodb,thorncp/cartodb,nyimbi/cartodb,UCL-ShippingGroup/cartodb-1,dbirchak/cartodb,nuxcode/cartodb,splashblot/dronedb,nuxcode/cartodb,splashblot/dronedb,CartoDB/cartodb,CartoDB/cartodb,codeandtheory/cartodb,splashblot/dronedb,DigitalCoder/cartodb,codeandtheory/cartodb,raquel-ucl/cartodb,nyimbi/cartodb,DigitalCoder/cartodb,UCL-ShippingGroup/cartodb-1,raquel-ucl/cartodb,CartoDB/cartodb,codeandtheory/cartodb,raquel-ucl/cartodb,dbirchak/cartodb,bloomberg/cartodb,dbirchak/cartodb,CartoDB/cartodb,thorncp/cartodb,codeandtheory/cartodb,dbirchak/cartodb,bloomberg/cartodb,bloomberg/cartodb,codeandtheory/cartodb,dbirchak/cartodb,splashblot/dronedb,nuxcode/cartodb,nuxcode/cartodb,nyimbi/cartodb,future-analytics/cartodb,UCL-ShippingGroup/cartodb-1,CartoDB/cartodb,future-analytics/cartodb,raquel-ucl/cartodb,DigitalCoder/cartodb,nyimbi/cartodb,nyimbi/cartodb,UCL-ShippingGroup/cartodb-1,future-analytics/cartodb,thorncp/cartodb