don't save children in abstract actor

Link: https://github.com/GeneAssembly/biosal/issues/516
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
rename bsal_actor_call_handler to include the word route

Link: https://github.com/GeneAssembly/biosal/issues/521
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add unit test list in test log

Link: https://github.com/GeneAssembly/biosal/issues/515
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
remove assembly graph class

Link: https://github.com/GeneAssembly/biosal/issues/517
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add assembly arc

Link: https://github.com/GeneAssembly/biosal/issues/518
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>