title: BizUnit web service test - setting MaxReceivedMessageSize
body: <p>I'm testing one of the wcf services published with BizTalk with biz unit, and using following code,</p>
  
  <pre><code> WebServiceStep wsStep = new WebServiceStep();
   wsStep.ServiceUrl = //service url;
   wsStep.FailOnError = true;
   wsStep.Action = //service method name;
  
   wsStep.RequestBody = new FileDataLoader() { FilePath = "request.xml"); 
   testCase.ExecutionSteps.Add(wsStep);
  </code></pre>
  
  <p>The given method usually return a lot of data which exceeds the maximum message size quota for incoming messages (65536), the problem is how can I set the <code>MaxReceivedMessageSize</code> in above test code?</p>