thorium_transport: improve calculation of maximum throughput

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: fix output of -print-thorium-data

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
unitig_manager: use member attribute to store count

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>