BUG: don't exit program if temp folder is not removed successfully
BUG: don't exit program if temp folder is not removed successfully

Former-commit-id: 9f3678e7ac3b034f47c45c633dc0c250467755fb
Former-commit-id: 3041f6f477e77b27aaa21a601db16d2cf1944fb6
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox