Enable Encrypted vMotion

The enumeration VirtualMachineConfigSpecEncryptedVMotionModes controls whether encrypted vMotion is disabled, opportunistic (fall back to default unencrypted vMotion if necessary), or required. If encrypted vMotion is required, or opportunistic and available, the vCenter Server can migrate either encrypted or unencrypted virtual machines within a disk cluster, or from one disk cluster to another using Storage vMotion.