Fixed bad terrain test that fails with new CWT
Fixed bad terrain test that fails with new CWT

kaktus40/cesium,likangning93/cesium,CesiumGS/cesium,CesiumGS/cesium,jasonbeverage/cesium,AnalyticalGraphicsInc/cesium,hodbauer/cesium,likangning93/cesium,geoscan/cesium,likangning93/cesium,progsung/cesium,CesiumGS/cesium,jasonbeverage/cesium,CesiumGS/cesium,hodbauer/cesium,likangning93/cesium,YonatanKra/cesium,josh-bernstein/cesium,CesiumGS/cesium,geoscan/cesium,YonatanKra/cesium,hodbauer/cesium,YonatanKra/cesium,AnalyticalGraphicsInc/cesium,likangning93/cesium,josh-bernstein/cesium,progsung/cesium,kaktus40/cesium,YonatanKra/cesium