fix example return value in utilization

Author: sanfilip

lib/machines/utilization.js

@@ -32,19 +32,18 @@ var assign = require('lodash.assign');
  * //Example return value:
  * {
  *   "machineId": "ps123abc",
- *   "secondsUsed": 1000,
  *   "utilization": {
  *     "machineId": "ps123abc",
- *     "secondsUsed": 1000,
+ *     "secondsUsed": 37351.08562622,
  *     "hourlyRate": "0.40",
  *     "billingMonth": "2017-08",
  *   },
  *   "storageUtilization": {
  *     "machineId": "ps123abc",
- *     "secondsUsed": 3000,
- *     "hourlyRate": "7.00",
+ *     "secondsUsed": 678400,
+ *     "monthlyRate": "7.00",
  *     "billingMonth": "2017-08",
- *   },
+ *   }
  * }
  */