Fixes for devices other than eth0
Fixes for devices other than eth0

BW limits were not working on nodes that don't use eth0 as the default interface.  Fixed by adding the default network device as an argument to the appropriate bwlimit calls.
dreibh/planetlab-lxc-nodemanager,dreibh/planetlab-lxc-nodemanager,planetlab/NodeManager,planetlab/NodeManager,planetlab/NodeManager,planetlab/NodeManager,dreibh/planetlab-lxc-nodemanager