TEST : Added integrity testing for get_centerline auto
TEST : Added integrity testing for get_centerline auto


Former-commit-id: 0abec6928a7f8df9ba83e381dc3e9303bf36a234
Former-commit-id: 6193fba5651a37d43d5cc2c1ef986194ce0a0096
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox