skip portions of test_LSCv2 if dipy.viz fails to import (e.g. missing VTK)
skip portions of test_LSCv2 if dipy.viz fails to import (e.g. missing VTK)

rfdougherty/dipy,beni55/dipy,nilgoyyou/dipy,maurozucchelli/dipy,rfdougherty/dipy,StongeEtienne/dipy,villalonreina/dipy,FrancoisRheaultUS/dipy,beni55/dipy,samuelstjean/dipy,demianw/dipy,Messaoud-Boudjada/dipy,jyeatman/dipy,maurozucchelli/dipy,nilgoyyou/dipy,Messaoud-Boudjada/dipy,maurozucchelli/dipy,JohnGriffiths/dipy,mdesco/dipy,demianw/dipy,StongeEtienne/dipy,matthieudumont/dipy,oesteban/dipy,JohnGriffiths/dipy,samuelstjean/dipy,samuelstjean/dipy,matthieudumont/dipy,jyeatman/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy,mdesco/dipy,oesteban/dipy,sinkpoint/dipy,sinkpoint/dipy