Fix User controller tests when running /test.php
Fix User controller tests when running /test.php

When running the tests from the browser, cookies saved
in the browser may change the language, which changes
the contents of error messages, which makes some tests
fail.

Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2