Description of problem:
Attempted to setupNetworks to change bond from 2 to 3 nics with the command:
MainProcess|Thread-135::DEBUG::2012-05-31 08:33:39,906::configNetwork::998::setupNetworks::(setupNetworks) Setting up network according to configuration: networks:{}, bondings:{'bond4': {'nics': ['eth1', 'eth2', 'eth3'], 'BONDING_OPTS': 'mode=802.3ad miimon=150'}}, options:{'connectivityCheck': 'true', 'connectivityTimeout': '60000'}


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Create bond over two bonds
2. Run setup networks to add another bond
  
Actual results:
Got exceptions:
MainProcess|Thread-135::ERROR::2012-05-31 08:33:40,014::configNetwork::1051::setupNetworks::(setupNetworks) '_networks'
Traceback (most recent call last):
  File "/usr/share/vdsm/configNetwork.py", line 1003, in setupNetworks
    _validateNetworkSetup(dict(networks), dict(bondings), explicitBonding=options.get('explicitBonding', False))
  File "/usr/share/vdsm/configNetwork.py", line 936, in _validateNetworkSetup
    networks = bondingAttrs['_networks']
KeyError: '_networks'
MainProcess|Thread-135::ERROR::2012-05-31 08:33:40,014::supervdsmServer::70::SuperVdsm.ServerCallback::(wrapper) Error in setupNetworks
Traceback (most recent call last):
  File "/usr/share/vdsm/supervdsmServer.py", line 68, in wrapper
    return func(*args, **kwargs)
  File "/usr/share/vdsm/supervdsmServer.py", line 136, in setupNetworks
    return configNetwork.setupNetworks(networks, bondings, **options)
  File "/usr/share/vdsm/configNetwork.py", line 1003, in setupNetworks
    _validateNetworkSetup(dict(networks), dict(bondings), explicitBonding=options.get('explicitBonding', False))
  File "/usr/share/vdsm/configNetwork.py", line 936, in _validateNetworkSetup
    networks = bondingAttrs['_networks']
KeyError: '_networks'
Thread-135::ERROR::2012-05-31 08:33:40,015::BindingXMLRPC::864::vds::(wrapper) unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/BindingXMLRPC.py", line 854, in wrapper
    res = f(*args, **kwargs)
  File "/usr/share/vdsm/BindingXMLRPC.py", line 331, in setupNetworks
    return api.setupNetworks(networks, bondings, options)
  File "/usr/share/vdsm/API.py", line 1156, in setupNetworks
    supervdsm.getProxy().setupNetworks(networks, bondings, options)
  File "/usr/share/vdsm/supervdsm.py", line 67, in __call__
    return callMethod()
  File "/usr/share/vdsm/supervdsm.py", line 65, in <lambda>
    **kwargs)
  File "<string>", line 2, in setupNetworks
  File "/usr/lib64/python2.7/multiprocessing/managers.py", line 773, in _callmethod
    raise convert_to_error(kind, result)
KeyError: '_networks'



Expected results:
Bond should be defined over the 3 interfaces.


Additional info:
This will probably happen when changing bond from 3 to 2 nics, but haven't tested that.