<!--- 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 -->

placement_policy=otypes.VmPlacementPolicy(
                affinity=otypes.VmAffinity(self.param('placement_policy')),
                hosts=[
                    otypes.Host(name=self.param('host')),
                ] if self.param('host') else None,
            ) if self.param('placement_policy') else None,
            soundcard_enabled=self.param('soundcard_enabled'),
            display=otypes.Display(
                smartcard_enabled=self.param('smartcard_enabled')
            ) if self.param('smartcard_enabled') is not None else None,
            io=otypes.Io(
                threads=self.param('io_threads'),
            ) if self.param('io_threads') is not None else None,
            numa_tune_mode=otypes.NumaTuneMode(
                self.param('numa_tune_mode')
            ) if self.param('numa_tune_mode') else None,
            rng_device=otypes.RngDevice(
                source=otypes.RngSource(self.param('rng_device')),
            ) if self.param('rng_device') else None,
            custom_properties=[
                otypes.CustomProperty(
                    name=cp.get('name'),
                    regexp=cp.get('regexp'),
                    value=str(cp.get('value')),
                ) for cp in self.param('custom_properties') if cp
            ] if self.param('custom_properties') is not None else None,
            initialization=self.get_initialization() if self.param('cloud_init_persist') else None,
            snapshots=[otypes.Snapshot(id=snapshot.id)] if snapshot is not None else None,
        )
    def _get_export_domain_service(self):