anchor.diff:  ===== Example
   
   ....
  -curl "localhost:1234/trigger-status?id=workflow-1&time=2015-09-13T13:40Z"
  +curl "localhost:1234/trigger-status?id=workflow-1&time=2015-09-13T13:00Z"
   ....
   
   prints:
  
positive.code:   "subStatuses" : [ {
      "type" : "DelayTrigger",
      "ready" : false,
      "description" : "Delayed until 2015-09-14T16:57:28.141Z",
      "subStatuses" : [ ]
    }, {
      "type" : "HDFSCheckTrigger",
  
negative.code:         "oozie.wf.application.path": "/my-workflow/workflow.xml",
          "param1": "Hello",
          "param2": "World"
      })
  });
  ....
  
  