Use publisher confirms in this test

Author: michaelklishin

projects/client/Unit/src/unit/TestBasicPublishBatch.cs

@@ -50,12 +50,14 @@ internal class TestBasicPublishBatch : IntegrationFixture
         [Test]
         public void TestBasicPublishBatchSend()
         {
+            Model.ConfirmSelect();
             Model.QueueDeclare(queue: "test-message-batch-a", durable: false);
             Model.QueueDeclare(queue: "test-message-batch-b", durable: false);
             var batch = Model.CreateBasicPublishBatch();
             batch.Add("", "test-message-batch-a", false, null, new byte [] {});
             batch.Add("", "test-message-batch-b", false, null, new byte [] {});
             batch.Publish();
+            Model.WaitForConfirmsOrDie(TimeSpan.FromSeconds(15));
             var resultA = Model.BasicGet("test-message-batch-a", true);
             Assert.NotNull(resultA);
             var resultB = Model.BasicGet("test-message-batch-b", true);