travisCI: use -assert config and full multi-threading to speed up testing
travisCI: use -assert config and full multi-threading to speed up testing

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