the only true way to send a message is bsal_actor_send

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
use the self variable name for the current actor

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
use the self variable name in the transport layer

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