[TEST] use more verbose assertion in IndicesRequestTests

src/test/java/org/elasticsearch/action/IndicesRequestTests.java

@@ -861,7 +861,7 @@ private String[] randomUniqueIndicesOrAliases() {
     private static void assertAllRequestsHaveBeenConsumed() {
         Iterable<TransportService> transportServices = internalCluster().getInstances(TransportService.class);
         for (TransportService transportService : transportServices) {
-            assertThat(((InterceptingTransportService)transportService).requests.isEmpty(), equalTo(true));
+            assertThat(((InterceptingTransportService)transportService).requests.entrySet(), emptyIterable());
         }
     }