Fixes #97489: We overrid LayerManager's configureLayerNode method to avoid setting baseAttrs transparent:true that affects layer legend loading from ArcGis, as WMSLoader.js adds a second TRANSPARENT:true, and ArcGIS dies when receiving the same parameter twice.
Merge pull request #293 from luisromangz/97489-FixArcGISLegendsFail

Fixes #97489: We overrid LayerManager's configureLayerNode method to avo...