Fixed tests for Instanced3DModel3DTileContent
Fixed tests for Instanced3DModel3DTileContent

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