Dataflow rejected data linked service (Azure#18907)

Author: kesharma

specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/DataFlow.json

@@ -296,6 +296,10 @@
           "description": "Schema linked service reference.",
           "$ref": "../datafactory.json#/definitions/LinkedServiceReference"
         },
+        "rejectedDataLinkedService": {
+          "description": "Rejected data linked service reference.",
+          "$ref": "../datafactory.json#/definitions/LinkedServiceReference"
+        },
         "flowlet": {
           "description": "Flowlet Reference",
           "$ref": "../datafactory.json#/definitions/DataFlowReference"