Simplify PHPUnit directory bug fix by removing dir function
Simplify PHPUnit directory bug fix by removing dir function

Per @greg-1-anderson 's request, removing the overriding dir method from PHPUnit task so that the ExecCommand::dir method is used instead.
iMi-digital/iRobo,duxet/Robo,iMi-digital/iRobo,iMi-digital/iRobo,Codegyre/Robo,duxet/Robo,Korikulum/Robo