osv_net_stats.py: Initial commit

It does the same as osv_net_stats.sh.

Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>
osv_net_stats.py: Added wakeup stats printing and improved the formatting

Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>