<!--- 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 entity is None:
            self._is_new = True
    def post_update(self, entity):
        self.post_present(entity.id)
    def post_present(self, entity_id):
        
        entity = self._service.service(entity_id).get()
        self.__attach_disks(entity)
        self.__attach_nics(entity)
        self._attach_cd(entity)
        self.changed = self.__attach_numa_nodes(entity)
        self.changed = self.__attach_watchdog(entity)
        self.changed = self.__attach_graphical_console(entity)
        self.changed = self.__attach_host_devices(entity)
    def pre_remove(self, entity):
        
        if entity.status != otypes.VmStatus.DOWN:
            if not self._module.check_mode:
                self.changed = self.action(
                    action='stop',
                    action_condition=lambda vm: vm.status != otypes.VmStatus.DOWN,
                    wait_condition=lambda vm: vm.status == otypes.VmStatus.DOWN,
                )['changed']
    def __suspend_shutdown_common(self, vm_service):