Move the otn link update from renderer to servicehandler, using the notification send by renderer when rendering task is accomplished, whatever is the final status. Take advantage of this feature to refactor things, especially:

• align service-path delete on service-path create
• use DeviceRenderingTask to both create and delete optical service
• uses action to create service-path inputs
• use new link-tp object to notify otn-link termination-points to be
  updated
• change updateOtnLink signature method to use new link-tp objects
  notified by renderer
• use service-type to chose between service-path or otn-service-path
• adapt RendererListener of service handler to handle otn-link update
  notifications received according to the service-type