OPT: changed run by runProcess in sct_utils
OPT: changed run by runProcess in sct_utils

Former-commit-id: d3dd08742e0e923469d54778b6cbf4f4ad05a0f6
Former-commit-id: d1d2fea8c3372c2f8e1bfded3245c5bd76629fac
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox