fio and systemtap tool fixes, neutron script

This release represents the first round of changes since pbench was initially open-sourced back in June. The goal here is to address a number of problems with the pbench_fio script, shore up as much as we can the systemtap tool use, provide an OpenStack Neutron script for networking setup, and other minor changes related to cleaning up the state of the source code.

We have marked this as "pre-release" because we don't yet have this delivered in any distributions just yet.