update tests to reflect empty taken_names situation
update tests to reflect empty taken_names situation

CartoDB/cartodb,splashblot/dronedb,codeandtheory/cartodb,CartoDB/cartodb,codeandtheory/cartodb,codeandtheory/cartodb,CartoDB/cartodb,codeandtheory/cartodb,CartoDB/cartodb,codeandtheory/cartodb,splashblot/dronedb,splashblot/dronedb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb