<!--- 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 -->

watchdogs_service = self._service.service(entity.id).watchdogs_service()
        watchdog = self.param('watchdog')
        if watchdog is not None:
            current_watchdog = next(iter(watchdogs_service.list()), None)
            if watchdog.get('model') is None and current_watchdog:
                watchdogs_service.watchdog_service(current_watchdog.id).remove()
                return True
            elif watchdog.get('model') is not None and current_watchdog is None:
                watchdogs_service.add(
                    otypes.Watchdog(
                        model=otypes.WatchdogModel(watchdog.get('model').lower()),
                        action=otypes.WatchdogAction(watchdog.get('action')),
                    )
                )
                return True
            elif current_watchdog is not None:
                if (
                    str(current_watchdog.model).lower() != watchdog.get('model').lower() or
                    str(current_watchdog.action).lower() != watchdog.get('action').lower()
                ):
                    watchdogs_service.watchdog_service(current_watchdog.id).update(
                        otypes.Watchdog(
                            model=otypes.WatchdogModel(watchdog.get('model')),
                            action=otypes.WatchdogAction(watchdog.get('action')),
                        )
                    )
                    return True
        return False
    def __attach_nics(self, entity):