Fix LifecycleLicenseIT failures (#66039)

This attempts to fix the flakiness in the LifecycleLicenseIT tests.
This waits for an active license to be available in the cluster (REST layer
comes up before) and adds busy waiting for setting/checking the licenses
with logging of responses.

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

x-pack/plugin/ilm/qa/multi-node/src/javaRestTest/java/org/elasticsearch/xpack/ilm/LifecycleLicenseIT.java

@@ -8,6 +8,7 @@ package org.elasticsearch.xpack.ilm;
 
 import org.apache.http.util.EntityUtils;
 import org.elasticsearch.client.Request;
+import org.elasticsearch.client.Response;
 import org.elasticsearch.client.ResponseException;
 import org.elasticsearch.cluster.metadata.DataStream;
 import org.elasticsearch.cluster.metadata.Template;
@@ -48,9 +49,10 @@ public class LifecycleLicenseIT extends ESRestTestCase {
     private String dataStream;
 
     @Before
-    public void refreshDatastream() {
+    public void refreshDatastream() throws Exception {
         dataStream = "logs-" + randomAlphaOfLength(10).toLowerCase(Locale.ROOT);
         policy = "policy-" + randomAlphaOfLength(5);
+        waitForActiveLicense(adminClient());
     }
 
     @After
@@ -130,11 +132,20 @@ public class LifecycleLicenseIT extends ESRestTestCase {
         XContentBuilder builder = JsonXContent.contentBuilder();
         builder = signedLicense.toXContent(builder, ToXContent.EMPTY_PARAMS);
         putTrialRequest.setJsonEntity("{\"licenses\":[\n " + Strings.toString(builder) + "\n]}");
-        client().performRequest(putTrialRequest);
+        assertBusy(() -> {
+            Response putLicenseResponse = client().performRequest(putTrialRequest);
+            logger.info("put trial license response body is [{}]", EntityUtils.toString(putLicenseResponse.getEntity()));
+            assertOK(putLicenseResponse);
+        });
     }
 
     private void checkCurrentLicenseIs(String type) throws Exception {
-        assertBusy(() -> assertThat(EntityUtils.toString(client().performRequest(new Request("GET", "/_license")).getEntity()),
-            containsStringIgnoringCase("\"type\" : \"" + type + "\"")));
+        assertBusy(() ->  {
+            Response getLicense = client().performRequest(new Request("GET", "/_license"));
+            String responseBody = EntityUtils.toString(getLicense.getEntity());
+            logger.info("get license response body is [{}]", responseBody);
+            assertThat(responseBody,
+                containsStringIgnoringCase("\"type\" : \"" + type + "\""));
+        });
     }
 }