[Workload Management] Add Workload Management IT

CHANGELOG.md

@@ -18,6 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Support for keyword fields in star-tree index ([#16233](https://github.com/opensearch-project/OpenSearch/pull/16233))
 - Add a flag in QueryShardContext to differentiate inner hit query ([#16600](https://github.com/opensearch-project/OpenSearch/pull/16600))
 - Add vertical scaling and SoftReference for snapshot repository data cache ([#16489](https://github.com/opensearch-project/OpenSearch/pull/16489))
+- [Workload Management] Add Workload Management IT ([#16359](https://github.com/opensearch-project/OpenSearch/pull/16359))
 - Support prefix list for remote repository attributes([#16271](https://github.com/opensearch-project/OpenSearch/pull/16271))
 - Add new configuration setting `synonym_analyzer`, to the `synonym` and `synonym_graph` filters, enabling the specification of a custom analyzer for reading the synonym file ([#16488](https://github.com/opensearch-project/OpenSearch/pull/16488)).
 - Add stats for remote publication failure and move download failure stats to remote methods([#16682](https://github.com/opensearch-project/OpenSearch/pull/16682/))

server/src/internalClusterTest/java/org/opensearch/search/backpressure/SearchBackpressureIT.java

@@ -314,7 +314,7 @@ public void testSearchCancellationWithBackpressureDisabled() throws InterruptedE
         assertNull("SearchShardTask shouldn't have cancelled for monitor_only mode", caughtException);
     }
 
-    private static class ExceptionCatchingListener implements ActionListener<TestResponse> {
+    public static class ExceptionCatchingListener implements ActionListener<TestResponse> {
         private final CountDownLatch latch;
         private Exception exception = null;
 
@@ -333,7 +333,11 @@ public void onFailure(Exception e) {
             latch.countDown();
         }
 
-        private Exception getException() {
+        public CountDownLatch getLatch() {
+            return latch;
+        }
+
+        public Exception getException() {
             return exception;
         }
     }
@@ -349,7 +353,7 @@ private Supplier<String> descriptionSupplier(String description) {
         return () -> description;
     }
 
-    interface TaskFactory<T extends Task> {
+    public interface TaskFactory<T extends Task> {
         T createTask(long id, String type, String action, String description, TaskId parentTaskId, Map<String, String> headers);
     }