title: Namespace for XMLList on JMSSerializerBundle
body: <p>I'm trying to create a XML using JMSSerializerBundle, and this XML must have some nodes with namespace (please see gist linked below for full code example) but I get a node with wrong namespace, and this wrong namespace is repeated even in parent node (XMLList).</p>
  
  <p>Have you ever faced a problem like this?
  Can you please help me figuring out how to solve this issue?</p>
  
  <p>Thanks a lot.</p>
  
  <p>code example - [1]: <a href="https://gist.github.com/coolder/38157850a45cfef7ff22" rel="nofollow">https://gist.github.com/coolder/38157850a45cfef7ff22</a></p>