Update to work correctly with IPFW.
Update test to work with IPFW.

Add calls to grab all sysctl output on all three hosts.  This
is the best way to grab all the device stats we might care
about for later analysis and it's cheap enough to do before
and after each test.
Update all pkt-gen runs to not use -n but to prefer a configured 30
second timeout via the timeout30: Conductor directive.

Add a vanilla test that does not record any pmc data.  This is the
baseline packet passing test.