Disable x-pack:qa:kerberos-tests due to failures (#43210)

relates #40678

x-pack/qa/kerberos-tests/src/test/java/org/elasticsearch/xpack/security/authc/kerberos/KerberosAuthenticationIT.java

@@ -8,6 +8,7 @@ package org.elasticsearch.xpack.security.authc.kerberos;
 
 import org.apache.http.HttpEntity;
 import org.apache.http.HttpHost;
+import org.apache.lucene.util.LuceneTestCase.AwaitsFix;
 import org.elasticsearch.client.Request;
 import org.elasticsearch.client.Response;
 import org.elasticsearch.client.RestClient;
@@ -47,6 +48,7 @@ import static org.hamcrest.Matchers.instanceOf;
  * Demonstrates login by keytab and login by password for given user principal
  * name using rest client.
  */
+@AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/40678")
 public class KerberosAuthenticationIT extends ESRestTestCase {
     private static final String ENABLE_KERBEROS_DEBUG_LOGS_KEY = "test.krb.debug";
     private static final String TEST_USER_WITH_KEYTAB_KEY = "test.userkt";