Using InOnly event message with vm component.

Issue

• When a route sends an inOnly event message to a vm endpoint, the response is not marshalled to JSON in the route that sends the event message.
• The "Accept" header is set to application/json in PostMan. I'd expect the response to be JSON as well.
• To reproduce send the following to http://localhost:9191/status/blocked and observe the response.

{
 "reason_code" :"sadf",
 "reason_description" : "123"
}

• Now comment the inOnly line, And you'll get an empty json object response.

      <!-- Comment/uncomment line below -->
      <inOnly uri="vm:submit" />