engine: Unsupported vnic profile features report for 3.0 clusters

For 3.0 clusters the engine uses the VmOldInfoBuilder to run the
VMs. It should consider the usage of unsupported features of the
vnic profiles for reporting a warning to the user.

Change-Id: I1f01229169e74bdd96ad989e89f7f0beaebf5a4b
Bug-Url: https://bugzilla.redhat.com/1024209
Signed-off-by: Moti Asayag <masayag@redhat.com>