[fix]还原就的ol3-echarts用法

Author: luoxiao-supermap

examples/openlayers/echartsEarthquake.html

@@ -61,7 +61,7 @@
         });
 
 
-        var echartslayer = new EChartsLayer(null, {
+        var echartslayer = new ol3Echarts(null, {
             hideOnMoving: true,
             hideOnZooming: true
         });