[TEST] enable host name resolving to gain consistent transport addresses in clusterstate

src/test/java/org/elasticsearch/test/InternalTestCluster.java

@@ -295,6 +295,7 @@ public final class InternalTestCluster extends TestCluster {
         builder.put("http.port", BASE_PORT+101 + "-" + (BASE_PORT+200));
         builder.put("config.ignore_system_properties", true);
         builder.put("node.mode", NODE_MODE);
+        builder.put("network.address.serialization.resolve", true); // this makes adresses in the clusterstate consistent
         builder.put("http.pipelining", enableHttpPipelining);
         builder.put("plugins." + PluginsService.LOAD_PLUGIN_FROM_CLASSPATH, false);
         builder.put(NodeEnvironment.SETTING_CUSTOM_DATA_PATH_ENABLED, true);