int/Integer is pre-registered to Kryo.

Change-Id: Ib66d8f3aac62ae837211d0e362207965403b4ead

@@ -38,7 +38,8 @@ public class DefaultMoveExtensionTreatment extends AbstractExtension
     private ExtensionTreatmentType type;
 
     private final KryoNamespace appKryo = new KryoNamespace.Builder()
-            .register(byte[].class).register(Integer.class).register(Map.class)
+            .register(byte[].class)
+            .register(Map.class)
             .build("DefaultMoveExtensionTreatment");
 
     /**