TEST: getstatusoutput instead od sct_utils.run()
TEST: getstatusoutput instead od sct_utils.run()

Former-commit-id: 84450c905dd02bf14afd1f57002e717a937d9b53 [formerly f96e3be4ed22b9f277ffafa895b3ab6b88284a48]
Former-commit-id: 02496459d60c3c337f2134b7c12de18eae12be9e
Former-commit-id: 9317236d25a39973027436f46e5ee9ecd58ea900
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox