Add method to flush and reload the reservation info from the node
object. Method to find out if a physical node has any virtual nodes allocated to it. Method to release the bandwidth that a vnode on a shared host is using. This uses the vinterfaces table to find out what link is using, and then increments the remaining_bandwidth of the interface_state table. Tables are locked of course. Add method to allocate an rtabid, since like ssh ports on remote nodes, the rtabid is now a shared counter on a sharedhost. Hmm, a change to the TipServer() method that was for using console on boss.