[TEST] mute test, we have issue #9270 for it

src/test/java/org/elasticsearch/search/child/SimpleChildQuerySearchTests.java

@@ -18,6 +18,7 @@
  */
 package org.elasticsearch.search.child;
 
+import org.apache.lucene.util.LuceneTestCase;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.ElasticsearchIllegalArgumentException;
 import org.elasticsearch.action.admin.indices.cache.clear.ClearIndicesCacheResponse;
@@ -284,6 +285,7 @@ public class SimpleChildQuerySearchTests extends ElasticsearchIntegrationTest {
     }
 
     @Test
+    @LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elasticsearch/elasticsearch/issues/9270")
     public void testClearIdCacheBug() throws Exception {
         // enforce lazy loading to make sure that p/c stats are not counted as part of field data
         assertAcked(prepareCreate("test")