added timeout

Author: martijnvg

server/src/test/java/org/elasticsearch/action/ingest/SimulateExecutionServiceTests.java

@@ -42,6 +42,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.BiConsumer;
 
@@ -378,7 +379,7 @@ public String getType() {
             errorHolder.set(e);
             latch.countDown();
         }));
-        latch.await();
+        latch.await(1, TimeUnit.MINUTES);
         assertThat(errorHolder.get(), nullValue());
         SimulatePipelineResponse response = responseHolder.get();
         assertThat(response, notNullValue());