title: Swagger - timestamp weird representation
body: <p>I have Spring Boot controller and for easy API reference used Swagger. 
  Question about <code>timestamp</code>. Why in generated documentation example looks like:</p>
  
  <p><code>
      "timestamp": {
        "date": 0,
        "day": 0,
        "hours": 0,
        "minutes": 0,
        "month": 0,
        "nanos": 0,
        "seconds": 0,
        "time": 0,
        "timezoneOffset": 0,
        "year": 0
      }
  </code></p>
  
  <p>So why swagger have so strange example for timestamp no just simple numeric value, which standard describes this representation?</p>