Python: don't cleanup on SIGINT if -nocleanup option has been provided
Python: don't cleanup on SIGINT if -nocleanup option has been provided

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3