Fixes #6919, do not check for host in regex group in log importer if format has no regex. Also add nginx json log to log importer system test.

unset a possible set idSite in the logout url, this should fix the error message not having access for idSite after logout.

fixed some system tests. the order change of some device reports changed as they have sometimes same orderid and as we moved some ecommerce reports it results in a different order now

These classes are only used in that plugin, so it doesn't make sense to keep then in Core.

Translations are now lazily loaded instead of being explicitely loaded by other components (e.g. the front controller, the plugin manager, etc...). Now other parties only configure "directories" where the translator can find translations. That makes the translator decoupled from the rest of Piwik.