title: jasper report custom properties are not accessible in customexporter
body: <p>I am writing my own custom xml exporter for jasper reports. I would like to define some properties in my .jrxml file, which i would like to access them later in my custom xml exporter.</p>
  
  <p>I have added two custom properties(last two). I can see the other two properties in my custom xml exporter but not my custom properties. Is there anything i am missing?</p>
  
  <pre><code>&lt;detail&gt;
  &lt;band height="13"&gt;
  &lt;textField isBlankWhenNull="true"&gt;
  &lt;reportElement key="auctionCode" x="256" y="0" width="48" height="13" uuid="03408ccf-c8ba-4e4f-8da6-694f02b70e4b"&gt;
  &lt;property name="net.sf.jasperreports.export.csv.column.name" value="ShipCountry"/&gt;
  &lt;property name="net.sf.jasperreports.export.csv.repeat.value" value="true"/&gt;
  &lt;property name="com.xxxx.cdt.export.xml.test.value" value="abcdefghij"/&gt;
  &lt;property name="com.xxxx.cdt.xml.test1.value1" value="ijklmnopqr"/&gt;
  </code></pre>