anchor.diff:  Doing a GET to this servlet returns the slots of a workflow within a
   time range.
   
  +It also returns other information about the workflow, such as its
  +paused state (see the <<pause>> servlet).
  +
   ===== Parameters
   
   [options="header"]
  
positive.code: [source,shell]
  ....
  curl -X POST "localhost:1234/rerun?id=workflow-1&time=2015-09-13T13:40Z"
  ....
  
  == Celos CI Reference
  
negative.code: 
  ....
  {
    "paused": false,
    "slots" : [ {
      "time" : "2015-09-13T13:50:00.000Z",
      "status" : "READY",
  