VCDriver: Live migration failed.

[Guangya Liu (Jay Lau)]

 DC1
    |
    |----Cluster1
    | |
    | |----9.111.249.56
    |
    |----Cluster2
               |
               |----9.111.249.49

Case 1)
One nova compute manage two clusters.

nova.conf:
cluster_name=Cluster2
cluster_name=Cluster1

live migration failed because target host and source host will be considered to the same host.

Case 2)
nova compute 1 manage Cluster1
nova.conf:
cluster_name=Cluster1

nova compute 2 manage Cluster2
nova.conf:
cluster_name=Cluster2

live migration failed because of
2014-02-12 11:47:38.557 32416 TRACE nova.openstack.common.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/virt/driver.py", line 598, in check_can_live_migrate_destination
2014-02-12 11:47:38.557 32416 TRACE nova.openstack.common.rpc.amqp raise NotImplementedError()
2014-02-12 11:47:38.557 32416 TRACE nova.openstack.common.rpc.amqp NotImplementedError