Upgrade flow not working in 9.0.0

[j-gironda]

The upgrade flow from anonymous to a full account is broken in 9.0.0.

Even with the enableAnonymousUsersAutoUpgrade() option set, the flow always returns RESULT_OK and creates a new user with a new UID, instead of linking the account to the existing anonymous user UID.

It happens no matter how setCredentialManagerEnabled is configured.

Downgrading to 8.0.2 solves it.