migrating instance can be terminated, and data inconsistency occurs

[Kei Masumoto]

Someone report to me below issue.
It is not critical, and not always occur, but should handle someway.

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Steps to reproduce:-
1) create one VM instance on host ubuntu-openstack-compute-01
2) call nova-manage vm live_migration
$nova/bin/nova-manage --flagfile=/etc/nova/nova.conf vm live_migration i-00000035 ubuntu-openstack-compute-01
3) Immediately call euca-terminate-instances i-00000035
4) euca-describe-instances doesn't display instance i-00000035.

I was expecting, the vm instance will be destroyed from the host ubuntu-openstack-compute-01.
But when I enter the command virsh list on ubuntu-openstack-compute-01
$virsh list
Id Name State
----------------------------------
  6 instance-00000035 running

That means, the instance is marked as deleted in the DB, but it didn't destroy the VM instance.
I think this is not correct.
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