Fix setting the provided password when creating an account when no SMTP server is configured.

[fhp]

Checklist

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Warnings

• This PR will change existing database contents.
• This PR introduces a breaking change to existing installations.

Summary

When creating a new account via the /settings/users/new page, while Email delivery is not configured, the entered password is not stored into the database. It is instead replaced by a randomly generated password.

Linked issues

I did not find an existing issue.

Description of changes

I added password and password_confirmation to the list of user params that were allowed. I also update the keys from key to string, so they matched with what was provided and would be overwritten by the keys in the user_params hash.