jenkins junit plugin gojne crazy: classname must not be a file but either a directory or not exist

src/commands.hxx

@@ -602,7 +602,8 @@ class Script: public QObject {
         xml::Node testcase("testcase");
         try {
           testcase.attr("classname") =
-            xmlattr(_testclass.size()?_testclass:(*cmd)->file(), true).toStdString();
+            xmlattr(_testclass.size()?"file: "+_testclass:(*cmd)->file(), true)
+            .toStdString();
           testcase.attr("name") = 
             xmlattr(QString("%1: %2")
                     .arg((*cmd)->line())