title: remove xml declaration in payload response
body: <p>I want remove xml declaration from wso response created by payload mediator (post method).</p>
  
  <pre><code>  &lt;?xml version='1.0' encoding='UTF-8'?&gt;
  &lt;soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:mgod="MgOdinCToCrm" xmlns:mgex="MgExchange"&gt;
      &lt;soapenv:Body&gt;
          &lt;m:getQuote xmlns:m="http://services.samples/xsd"&gt;
              &lt;m:request&gt;
                  &lt;m:symbol/&gt;
              &lt;/m:request&gt;
          &lt;/m:getQuote&gt;
      &lt;/soapenv:Body&gt;
  &lt;/soapenv:Envelope&gt;
  </code></pre>
  
  <p>I try use xslt and js mediators to modify response, but it isn't help. This mediator can modify content only in body tag. May be someone faced with this problem</p>