[ticket/13147] Change get_global_visibility_sql()'s results

https://tracker.phpbb.com/browse/PHPBB3-13147

fixing pushing branch on #3200
Try:
```php
$phpbb_dispatcher = $this->getMockBuilder('\phpbb\event\dispatcher')
	->disableOriginalConstructor()
	->getMock();
```

Same in all other tests and in the other PR that is failing