fixing up tests

Signed-off-by: Neil South <neil.south@answerdigital.com>

Author: neildsouth

tests/UnitTests/PayloadListener.Tests/Services/EventPayloadRecieverServiceTests.cs

@@ -365,6 +365,7 @@ private static MessageReceivedEventArgs CreateMessageReceivedEventArgs(string[]
                 Files = new[] { "file1" },
                 MessageId = Guid.NewGuid().ToString(),
                 WorkflowInstanceId = Guid.NewGuid().ToString(),
+                PayloadId = Guid.NewGuid().ToString()
             };
             var jsonMessage = new JsonMessage<ExportRequestEvent>(exportRequestMessage, MessageBrokerConfiguration.WorkflowManagerApplicationId, exportRequestMessage.CorrelationId, exportRequestMessage.DeliveryTag);