title: MQTT Support on IoT Edge
body: <p>I am trying to get mqtt on edge preview according to the <a href="https://docs.microsoft.com/en-us/azure/iot-edge/how-to-publish-subscribe?view=iotedge-2020-11" rel="nofollow noreferrer">docs</a>
  I can’t get it to work because using VSC to add <strong>mqttBroker</strong> as a desired property on the manifest fails as below:</p>
  <pre><code>There are errors in deployment manifest file: 
  data.modulesContent.$edgeHub['properties.desired'] should NOT have additional properties
  </code></pre>