updated test_decorators.py
updated test_decorators.py

FrancoisRheaultUS/dipy,matthieudumont/dipy,StongeEtienne/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy,StongeEtienne/dipy,nilgoyyou/dipy,matthieudumont/dipy,villalonreina/dipy