TESTS: remove some unnecessary tests regarding MK numerical method estimate; and test_Wrotate_test is now done relatively to a randomly oriented single fiber simulate
TESTS: remove some unnecessary tests regarding MK numerical method estimate; and test_Wrotate_test is now done relatively to a randomly oriented single fiber simulate

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