Trying to re-enable these tests now that we've rewritten how archive.php works, maybe this will work better?

Add unit test check PHP files start with <?php -> prevent human error when IDE does not show white spaces

Fix tests, add Zeitigest as disabled by default + make sure order is different so reports are sorted

During tests, we shall load plugins that are in the .gitmodule file (official plugins found in marketplace),
as well as loading those that are in the global.ini.php (official plugins bundled in piwik).

Revert change to not hardcode any plugin list (as nobody would remember to update those when we add plugins)

[automatic translation update] Updated 85 strings in 6 languages (bg, et, hr, ro, sv, fr)