sct_pipeline: fixup logging arguments
sct_pipeline: fixup logging arguments


Former-commit-id: 2bf3a37a0bff8d1398e044e609f9de4ccfd1d98d
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox