CLOUDSTACK-1648 - KVM - make storage pools non-persistent in libvirt. Persisting
cloud-defined resources on the host has caused various problems. As a backward
compatible fix, if an existing pool with a different name collides with a pool
being created (by path), the pool will be redefined with the name cloudstack
knows about. This is actually what brought up the bug, a persisted storage pool
cloudstack wasn't managing.

Signed-off-by: Marcus Sorensen <marcus@betterservers.com> 1363210149 -0600