Use classname inside ooclass for the extends reference

Author: lacatoire

reference/filter/filter.filterfailedexception.xml

@@ -25,7 +25,7 @@
 
      <ooclass>
       <modifier>extends</modifier>
-      <exceptionname>Filter\FilterException</exceptionname>
+      <classname>Filter\FilterException</classname>
      </ooclass>
 
      <classsynopsisinfo role="comment">&InheritedProperties;</classsynopsisinfo>