eth2 should be promiscussed from vbox too :(

nobody told us this, so we ended up wasting two weeks. Never mind.

NOTE: the VMs will be pingable, but they wont have any internet connectivity
still. Need to add a masquerading rule for br100 on controller node, with
10.0.0/24 as the input address. Not remembering the exact rule right now.

so milestone 1 completed here successfully. Time to start running again!
Merge branch 'master' of https://github.com/ajayaa/cloudguru