Attempting to change the power state of existing VM by using its uuid instead of VM name is failing:

fatal: [localhost]: FAILED! => {
    "msg": "Mandatory variable 'provision_vm_name'  not defined."
}

In the documentation it says that `provision_vm_name` is required only in the case the VM doesn't exist, while `provision_vm_uuid` is required if the VM name is not supplied.

The same error is produced when trying to update other settings of the existing VM using `provision_vm_uuid` instead of `provision_vm_name`