Added `--exe` argument to nosetest default
Added `--exe` argument to nosetest default

See https://github.com/iterative/dvc/issues/1736#issuecomment-473665122
dmpetrov/dataversioncontrol,efiop/dvc,efiop/dvc,dmpetrov/dataversioncontrol,dataversioncontrol/dvc,dataversioncontrol/dvc