Message about bad password format right after changing password.

Steps:

1. Follow the steps from EZP-31462: https://issues.ibexa.co/browse/EZP-31462?focusedCommentId=255170&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-255170.
2. After changing the password go to login page.

Actual result: The message "User's password is in a format which is not supported any more" is displayed one more time after changing the password.
Expected result: The message is not displayed after generating a new password.