engine:Trusted Compute Pools - Open Attestation integration with oVirt engine

Detailed description: http://wiki.ovirt.org/Trusted_compute_pools

Add Audit log message when creating a VM in a non-trusted cluster from a Template that was originally created in a trusted cluster.

Change-Id: I3a89c59ba97628292ff5941290beda87b5137e8b
Signed-off-by: Gang Wei <gang.wei@intel.com>
Signed-off-by: Emily <lijuan.zhang@intel.com>