update structure of JSON data

[sjwang90]

@Jayclifford345 Can we update the structure of the json data coming from the simulator from what we agreed to in Slack? We're going to use this as a guide for users to connect to.

{
   "device":{
      "generator_id":"generator1",
      "coord":[
         {
            "deployment-type":"production",
            "lat":40.68066,
            "lon":-73.47429
         },
         {
            "deployment-type":"development",
            "lat":39.68066,
            "lon":-73.47429
         }
      ]
   },
   "payload":{
      "Temperature":186,
      "Power":186,
      "Load":2,
      "Fuel":277
   }
}