Can't assign the same IP address to two different MAC addresses

[Raphaël Badin]

When NIC are bonded, different NICs need to be assigned the same IP in the DHCP config.

MAAS doesn't support this at the moment and this restriction needs to be lifted.

A couple of places will need to be changed for this to be possible: (the following list is non-exhaustive, just a starting point)
- multiple staticipaddress objects with the same IP need to be stored in the DB
- the omshell module (provisioningserver.dhcp.omshell) need to be changed to use the MAC address (and not the IP) and the 'key' used to identify hostmaps. Right now the leases file looks like this: http://paste.ubuntu.com/11522409/. Note that the IP is used as the key. This obviously poses an upgrade problem.

[Andres Rodriguez (andreserl)]

@Ante,

Ca you pelase show the bond configuration?