Fix time-dependent test
Fix time-dependent test

CesiumGS/cesium,likangning93/cesium,likangning93/cesium,likangning93/cesium,progsung/cesium,likangning93/cesium,progsung/cesium,CesiumGS/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,likangning93/cesium,CesiumGS/cesium