Fix EZP-23222: LanguageSwitcher does not work in content preview
Fix EZP-23221: prevent fatal error in RouteReferenceGenerator if there is no request route.
Fix EZP-23210: Exception thrown when using alternative user provider/login handler

> https://jira.ez.no/browse/EZP-23210

When accessing to a protected resource, Symfony Security component generates a RedirectResponse to
the configured `login_path` (default being `/login`. This path can actually be an URI, but also a *route name*.
Some authentication *extensions* like `FOSUserBundle` use that.

Of course, when a route name is used, the UrlGenerator is called, with the route name and **all the request
attributes as parameters**. The problem is that the current SiteAccess object is stored as `siteaccess` request attribute,
which has the effect to trigger reverse SiteAccess matching, which is of course not an expected behavior.
Merge pull request #945 from joaoinacio/EZP-23221_ezroute_no_route_fatal_error

Fix EZP-23221: fatal error in RouteReferenceGenerator if there is no request route.
Merge pull request #946 from joaoinacio/EZP-23222

Fix EZP-23222: LanguageSwitcher does not work in content preview
Fix EZP-23168: ESI Request URLs exceed acceptable size of 8KB
Merge pull request #949 from dfritschy/fix_EZP-23168_ESIMapMatcher

Fix EZP-23168: ESI Request URLs exceed acceptable size of 8KB
Fix EZP-23228: Wrong translation code for cze
Removed forgotten and obsolete registerInternalConfig() on Common config parser
Fix EZP-23234: provide a default (null) locationId for the internal _ezpublishLocation route