Need bwlimit.py from util-vserver-pl. Adding it at NodeManager to keep track of the changes.
Need bwlimit.py from util-vserver-pl. Adding it at NodeManager to keep track of
the changes.

dreibh/planetlab-lxc-nodemanager,dreibh/planetlab-lxc-nodemanager,dreibh/planetlab-lxc-nodemanager