After the upgrade process, but before upgrading the ezflow packages its not possible to clear caches ...
The following error is present if ezstarrating 1.1.0 is present on extension folder if you run:

$php bin/php/ezcache.php --clear-all --purge

PHP Fatal error: Call to undefined function ezi18n() in /var/www/apache2php53/ezp/upgraded/ezpublish-4.7.0/extension/ezstarrating/datatypes/ezsrrating/ezsrratingtype.php on line 36

This is due to the change of the ezi18n function that after this version is now ezpI18n

Steps to reproduce

1. Create a ezp 4.4 installation (ezflow with demo content)
2. Upgrade the installation to 4.5 using the on-line documentation
3. Verify that if you try to run the clear caches command the error is present