Small set of changes to make snmpit work correctly for the control router. I also added entries in the database for ports that are in vlans (other than the default #1) that aren't connected to a node in the database. So, from now on, when an empty port is in a vlan, we need to put an entry in the wires table that says its connected to node 'empty' on some unused port number.
Small set of changes to make snmpit work correctly for the control router. I also added entries in the database for ports that are in vlans (other than the default #1) that aren't connected to a node in the database. So, from now on, when an empty port is in a vlan, we need to put an entry in the wires table that says its connected to node 'empty' on some unused port number.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome