Waiting for termination for tests

Author: jonathan-buttner

x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/external/http/sender/RequestExecutorServiceTests.java

@@ -502,6 +502,7 @@ public void testChangingCapacity_DoesNotRejectsOverflowTasks_BecauseOfQueueFull(
         service.start();
 
         executorTermination.get(TIMEOUT.millis(), TimeUnit.MILLISECONDS);
+        service.awaitTermination(TIMEOUT.getSeconds(), TimeUnit.SECONDS);
         assertTrue(service.isTerminated());
         assertThat(service.remainingQueueCapacity(requestManager), is(1));
         assertThat(service.queueSize(), is(0));