added prepare for reuse

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

VDS/Classes/CollectionViewCell.swift

@@ -87,4 +87,11 @@ open class CollectionViewCell<ModelHandlerType: ModelHandlerable & UIView>: UICo
         modelHandler.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
         modelHandler.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
     }
+    
+    open override func prepareForReuse() {
+        super.prepareForReuse()
+        if let handler = modelHandler as? Resettable {
+            handler.reset()
+        }
+    }
 }