REF: separate validation flags for extensive testing
REF: separate validation flags for extensive testing

Former-commit-id: 40367eb55425c2e2daec2add6671a2e72a372e4c [formerly 7f5b11a84a9f77880b7ea1bac3311b142ab937d2]
Former-commit-id: 7444aa87dabd8edf61108a6a57b9ee5f2a2ffc5c
Former-commit-id: d28efcd5d04dfde973a1b4244e13513397c63be3
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox