AMQ doesn't translate the character "/" to "." in MQTT clients

Starting with 7.10.x, the broker doesn't translate the character "/" to "." when using MQTT clients.

For example, in previous versions, a client configured with the following properties 

clientId: mqtt
topic: TEST/TOPIC

would consume message from a queue defined like this:

<addressname="TEST.TOPIC">
  <multicast>
    <queuename="mqtt.TEST.TOPIC"/>
  </multicast>
</address>

Now, in the affected versions, this will not work, the client will create (if it has permissions to create queues) or will expect (if it doesn't have permissions to create queues) a queue with the following format:

<addressname="TEST.TOPIC">
  <multicast>
    <queuename="mqtt.TEST/TOPIC"/>
  </multicast>
</address>

This is breaking clients applications when upgrading  the broker from versions before than 7.10.