Merge pull request #332 in ZP/z-push from bugfix/ZP-1007-wbxml-in-not-logged-if-requesthandler--handle to develop

* commit '58517e5b':
  ZP-1007 Changed wbxml debug output to FATAL loglevel.
  ZP-1007 Always log Wbxml debug data in case there is an error during RequestHandler->Handle().