[fix][test] testModularLoadManagerRemoveBundleAndLoad (apache#19710)

Author: AnonHxy

pulsar-broker/src/test/java/org/apache/pulsar/broker/namespace/NamespaceServiceTest.java

@@ -45,7 +45,7 @@
 import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
 import lombok.Cleanup;
@@ -823,10 +823,10 @@ private void waitResourceDataUpdateToZK(LoadManager loadManager) throws Exceptio
         // Wait until "ModularLoadManager" completes processing the ZK notification.
         ModularLoadManagerWrapper modularLoadManagerWrapper = (ModularLoadManagerWrapper) loadManager;
         ModularLoadManagerImpl modularLoadManager = (ModularLoadManagerImpl) modularLoadManagerWrapper.getLoadManager();
-        ScheduledExecutorService scheduler = (ScheduledExecutorService) FieldUtils.readField(
-                modularLoadManager, "scheduler", true);
+        ExecutorService executors = (ExecutorService) FieldUtils.readField(
+                modularLoadManager, "executors", true);
         CompletableFuture<Void> waitForNoticeHandleFinishByLoadManager = new CompletableFuture<>();
-        scheduler.execute(() -> waitForNoticeHandleFinishByLoadManager.complete(null));
+        executors.execute(() -> waitForNoticeHandleFinishByLoadManager.complete(null));
         waitForNoticeHandleFinishByLoadManager.join();
         // Manually trigger "LoadResourceQuotaUpdaterTask"
         loadManager.writeResourceQuotasToZooKeeper();