Modify the output so that Jenkins XUnit plugin will parse it correctly

It seems that xunit performs some validations on the output XML. Which causes it to fail as some of the yarjuf output is badly formatted at least according to xUnit.

BTW I've found this schema which might clear things up a bit
https://svn.jenkins-ci.org/trunk/hudson/dtkit/dtkit-format/dtkit-junit-model/src/main/resources/com/thalesgroup/dtkit/junit/model/xsd/junit-4.xsd

PS sorry for duplicate PR, I used wrong branch for the first one. (And i could find a place to change branch in github)