drone position update - status

this PUT:
https://kb-dsp-server-dev.herokuapp.com/api/v1/drones/584adbcfaebc030004a68a8d

```
{  
  "lat": 40.1, 
   "lng": -81.1, 
   "status": "idel-busy"
}
```
returns status not allowed.  400

drone should be able to change their status with lat and lng
