updated 
equestImage and the constructor in WebMapTileServiceImageryProvider.js to address issue #9598
updated 
equestImage and the constructor in WebMapTileServiceImageryProvider.js to address issue #9598

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