NEW: test_all: add sct_fmri_compute_tsnr to the tests
NEW: test_all: add sct_fmri_compute_tsnr to the tests

Former-commit-id: 3a2dae709ce45a5a71ad64945935a2d9e5c213cd [formerly 3d257acba6aae57e793e65156dc0c00a8de14bc1]
Former-commit-id: c8343f31d92557a2f806d3d97da26b4ff1919493
Former-commit-id: f2e29f1617cff17e28ad2f2c2a2ae7c2904b5637
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox