Fixed leaflet 1.0.2 bug where clearLayers would throw an exception
Fixed leaflet 1.0.2 bug where clearLayers would throw an exception

The exception was that the function 'this._childmarkerMoved' could not be found because the context was not known. So I passed the context in the 'eachLayer' function
Leaflet/Leaflet.markercluster,Leaflet/Leaflet.markercluster,ghybs/Leaflet.markercluster,ghybs/Leaflet.markercluster,frenomus/Leaflet.markercluster,frenomus/Leaflet.markercluster