Velocity JSON tool serializer does not respect java.beans.Transient annotation

Jackson (which is what used the JSON tool) serialize an object based on Java bean specification but is not actually using Java bean which mean it does not take into account things it does not know like java.beans.Transient which has been introduced in Java 7 (Jackson is still based on Java 6). See https://github.com/FasterXML/jackson-databind/issues/857.