BUG: process_segmentation: fixed wrong default path to vertebral labeling
BUG: process_segmentation: fixed wrong default path to vertebral labeling

Former-commit-id: 90953c68aed68838e6f961e24b0bf4624d33c9eb [formerly 8f46e4a1494bc83ae3c7e7630e69b441eeda9360]
Former-commit-id: 3c06ff85632b457d7c103f01380a03221b1534ec
Former-commit-id: 14cf421b954bf1be7aca2ee8e4b2a945a729fb6a
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox