MODLOGINKC-35: fix error code while 401 in Keycloak

[yauhen-vavilkin]

Purpose

https://folio-org.atlassian.net/browse/MODLOGINKC-35
Our assumption that mod-login-keycloak return 400 to kong, but actual response code is 401. As well there is no logs in login-keycloak at all, which makes hard to troubleshoot the problem. Please update logging for those services with correct status code

Approach

• catch 401 Keycloak error
• add tests /update tests

Pre-Merge Checklist:

Before merging this PR, please go through the following list and take appropriate actions.

• Does this PR meet or exceed the expected quality standards?
  • Code coverage on new code is 80% or greater
  • Duplications on new code is 3% or less
  • There are no major code smells or security issues
• Does this introduce breaking changes?
  • Were any API paths or methods changed, added, or removed?
  • Were there any schema changes?
  • Did any of the interface versions change?
  • Were permissions changed, added, or removed?
  • Are there new interface dependencies?
  • There are no breaking changes in this PR.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud