Use static inner class. #4298

@@ -320,11 +320,8 @@ public class DirectControlServlet extends HttpServlet {
         }
         return delegator;
     }
-}
-
-class ISODateValueProcessor implements JsonValueProcessor {
-    public static final String module = ISODateValueProcessor.class.getName();
 
+    protected static class ISODateValueProcessor implements JsonValueProcessor {
         public ISODateValueProcessor() {
         }
 
@@ -340,4 +337,5 @@ class ISODateValueProcessor implements JsonValueProcessor {
             String newValue = value.toString();
             return newValue;
         }
+    }
 }