add code path for  intra-node messaging

Link: https://github.com/GeneAssembly/biosal/issues/13
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
Send message between actors on same node

Link: https://github.com/GeneAssembly/biosal/issues/13
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>