Additional Logging to track down eventual errors in IT tests (#14863)

* reverting preemptive auth using restassured

* add possibility to set a minimum error code (if you don't expect a 4xx for example)

* upped log level

* adding preemptive back in

* Update GraylogBackend.java

* remove preemptive()

data-node/src/test/java/org/graylog/datanode/integration/DatanodeSecuritySetupIT.java

@@ -93,7 +93,7 @@ public class DatanodeSecuritySetupIT {
         waitForOpensearchAvailableStatus(backend.getDatanodeRestPort());
 
         given()
-                .auth().preemptive().basic("admin", "admin")
+                .auth().basic("admin", "admin")
                 .trustStore(buildTruststore(httpCert, "password"))
                 .get("https://localhost:" + backend.getOpensearchRestPort())
                 .then().assertThat()