OS-438, [v3] IPv6 support for Infoblox

Code was rebased
Is there absolutely no way to get the pid from the netns.execute() and utils.execute() above? It seems odd that we have to figure out what the pid is inside _save_process_pids() below by scanning /proc

Not only that it is inefficient, it would be possible to, for example, pick up the same process that was started previously.

BTW, it just occur to me - before we spawn a new process, should we kill existing process (with the exact same cmd) just in case they were stale?