Mute TokenBackwardsCompatibilityIT.testGeneratingTokenInOldCluster

See elastic#41671

Author: davidkyle

x-pack/qa/rolling-upgrade/src/test/java/org/elasticsearch/upgrades/TokenBackwardsCompatibilityIT.java

@@ -7,6 +7,7 @@
 
 import org.apache.http.HttpHeaders;
 import org.apache.http.HttpHost;
+import org.apache.lucene.util.LuceneTestCase;
 import org.elasticsearch.Version;
 import org.elasticsearch.client.Request;
 import org.elasticsearch.client.RequestOptions;
@@ -26,6 +27,7 @@
 import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
 import static org.hamcrest.Matchers.equalTo;
 
+@LuceneTestCase.AwaitsFix( bugUrl = "https://github.com/elastic/elasticsearch/issues/41671")
 public class TokenBackwardsCompatibilityIT extends AbstractUpgradeTestCase {
 
     public void testGeneratingTokenInOldCluster() throws Exception {