feat: Adds support for Keycloak 26.1

[maximilian-krauss]

What this PR does / why we need it:

Adds support for Keycloak 26.1.

Which issue this PR fixes: fixes #1253

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[AssahBismarkabah]

Hi @maximilian-krauss,

Thank you for the fix. , the issue on the ci seems to not be feasible, as we are also experiencing the same failure for those keycloak versions. I would appreciate it if you could look into the root cause.

For the lint-other-files step, ubuntu-latest jumped to ubuntu-24 which did not support python 3.7, you can pin the version to ubuntu-22.04

[maximilian-krauss]

Hi @AssahBismarkabah,
That's a pretty odd behavior. Its pretty hard to reproduce the failing behaviour and it also seems to be different between KC26 and KC26.1 👀

[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

[AssahBismarkabah]

@maximilian-krauss I also noticed that too, but the error below occurs locally using kc-26.1 at ImportAuthenticationFlowsIT. However, I couldn't replicate the other failure at ChecksumServiceCasesIT.

java.lang.AssertionError: 
Expected: a collection with size <2>
     but: collection size was <1>

	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
	at de.adorsys.keycloak.config.service.ImportAuthenticationFlowsIT.shouldUpdateMultipleExecutionsWithSameAuthenticator(ImportAuthenticationFlowsIT.java:764)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.b
	```

[maximilian-krauss]

Yes, I also can reproduce the ImportAuthenticationFlowsIT failure, but only if I run it the whole suite via maven. If I execute them via IntelliJ they work just fine

[antikalk]

Yes, I also can reproduce the ImportAuthenticationFlowsIT failure, but only if I run it the whole suite via maven. If I execute them via IntelliJ they work just fine

On my side it also fails when just running the ImportAuthenticationFlowsIT in Intellij. I had a look at the test code, which confuses me:

keycloak-config-cli/src/test/java/de/adorsys/keycloak/config/service/ImportAuthenticationFlowsIT.java

Lines 762 to 764 in 1e3badb

	List<AuthenticatorConfigRepresentation> authConfig;
	authConfig = getAuthenticatorConfig(realm, "id1");
	assertThat(authConfig, hasSize(2));

Why should we find two configs for the same alias?