fix memory leaks
i updated my cmake setup for your latest changes and then compiled with the memory Leak Sanitizer enabled. the current code does not pass this test (it needs to free everything it allocates before exiting).
have you looked that? the reason it came up is that I updated our Deltafs travis-ci build to use the Address Sanitizer and Leak Sanitizer and noticed that we passed everything except for our margo test (failing the leak sanitizer).
Leaks confirmed, mostly related to setting up pools and schedulers in Argobots without cleaning them up at the end of execution.