Merge pull request #7476 from owncloud/type-hinting

lib/private/appconfig.php

lib/private/cache.php

lib/private/contactsmanager.php

lib/private/db.php

lib/private/image.php

lib/private/l10n.php

lib/private/legacy/appconfig.php

lib/private/legacy/config.php

lib/private/server.php

lib/private/share/mailnotifications.php

lib/private/template/base.php

lib/public/contacts/imanager.php

lib/public/iappconfig.php

lib/public/il10n.php

lib/public/iservercontainer.php

settings/admin/controller.php

tests/lib/appframework/routing/RoutingTest.php

tests/lib/dbschema.php