Fix EZP-21989 Increase code coverage for EzPublishCoreBundle event listeners

https://jira.ez.no/browse/EZP-21989

## TODO

* [x] ViewControllerListener
* [x] RequestEventListener
* [x] LocaleListener
* [x] RoutingListener
* [x] SessionInitByPostListener
* [x] SessionSetDynamicNameListener
* [x] SiteAccessListener