awaits fix for another test failing due to exception serialization changes

Original commit: elastic/x-pack-elasticsearch@9585a3647b

src/test/java/org/elasticsearch/integration/ldap/MultiGroupMappingTests.java

@@ -5,6 +5,7 @@
  */
 package org.elasticsearch.integration.ldap;
 
+import org.apache.lucene.util.LuceneTestCase;
 import org.elasticsearch.test.junit.annotations.Network;
 import org.junit.Test;
 
@@ -14,6 +15,7 @@ import java.io.IOException;
  * This tests the mapping of multiple groups to a role
  */
 @Network
+@LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch-shield/issues/947")
 public class MultiGroupMappingTests extends AbstractAdLdapRealmTests {
 
     @Override