StackOverflowError in case of name conflict

[vcharpenay]

When a name conflict occur in a TD, the method TDTransform.asJsonLd11ForType() runs into an infinite loop. E.g. (conflictingName used twice):

{
  "id": "tag:something",
  "properties":
    "conflictingName": {
      "type": "object",
      "properties": {
        "conflictingName": {
          "type": "string"
        }
      }
    } 
}