anchor.diff:      {
         "id": "21",
         "data": {
  -				  "code": "John Doe <john@doe.org>",
  -				  "display_name": "John Doe",
  +				  "code" : "John Doe <john@doe.org>",
   				  "email" : ["john@doe.org", "john.doe@gmail.com"]
   				}
   			}
  
positive.code:   ]
  }
  
  Create/update contributor configuration. 
  If `id` is provided as part of request URL then this one is used, so for update you have to use it always. 
  If `id` is not provided then new record is created in the DCP and some unique id is allocated and returned back.  
  
  ##### Request content
  JSON with project configuration structure.
  
  ##### Response content
  The response contains a JSON structure with `id`. Returns DCP generated id for request without input id.
  
  POST /rest/contributor
  > Accept: application/json
  {
    "code": "John Doe <john@doe.org>",
    "display_name": "John Doe",
    "email" : ["john@doe.org", "john.doe@gmail.com"]
  }
  < 200
  
negative.code: < 200
  < Content-Type: application/json
  {
    "code" : "John Doe <john@doe.org>",
    "email" : ["john@doe.org", "john.doe@gmail.com"]
  }
  
  