fix: broken linked account feature

[netroms]

Problem:

Users could not switch between linked account users.

Cause:

When the log out handler (DhisOidcLogoutSuccessHandler), was called and tried to set the user we want to switch to with the method setActiveLinkedAccounts(), nothing happened because the there was no transaction involved, because it called the UserStore directly, instead of going through the service layer.
So when it tried to persist the updated lastLogin field, nothing happened.

Solution:

Add the setActiveLinkedAccounts() method to the UserService and annotate it with @transactional and make the log out handler call the new method.

Automatic tests:

Automatic tests not available, because it needs a full setup with an external IDP and tests with E2E.

Manual test:

1. Enable a OIDC provider. (See documentation for setting up with Google for example).
2. Enable linked account. linked_accounts.enabled = on and linked_accounts.relogin_url = http://localhost:8080 in dhis.conf
3. Create two users that has the same OIDC mapping.
4. Log in as user A.
5. Try to log out and switch to user B, with URL like this: http://localhost:8080/dhis-web-commons-security/logout.action?switch=userb&current=usera
6. Observe next time you log in (with OIDC) you now get logged in as user B.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud