<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Add 'restart' state or restart option to the `ovirt_vm` module.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ovirt_vm

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

<!--- HINT: You can also paste gist.github.com links for larger files -->

if self.param('snapshot_vm') is None:
            return None
        if self.param('snapshot_name') is None:
            return None
        vms_service = self._connection.system_service().vms_service()
        vm_id = get_id_by_name(vms_service, self.param('snapshot_vm'))
        vm_service = vms_service.vm_service(vm_id)
        snaps_service = vm_service.snapshots_service()
        snaps = snaps_service.list()
        snap = next(
            (s for s in snaps if s.description == self.param('snapshot_name')),
            None
        )
        return snap
    def __get_cluster(self):
        if self.param('cluster') is not None:
            return self.param('cluster')
        elif self.param('snapshot_name') is not None and self.param('snapshot_vm') is not None:
            vms_service = self._connection.system_service().vms_service()
            vm = search_by_name(vms_service, self.param('snapshot_vm'))
            return self._connection.system_service().clusters_service().cluster_service(vm.cluster.id).get().name
    def build_entity(self):