Fix 1827, added execution time in sct_launcher
Fix 1827, added execution time in sct_launcher


Former-commit-id: 42d3eeb9f19e9fdc24a9bb19f20122321ee43d41
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox