dropwizard#19: Update README, update config unit test.

README.md

@@ -43,7 +43,7 @@ Configuration
 
 The following configuration settings are supported by `EsConfiguration`:
 
-* `nodeClient`: When `true`, `ManagedEsClient` will create a `NodeClient`, otherwise a `TransportClient`; default: `true`
+* `nodeClient`: When `true`, `ManagedEsClient` will create a `NodeClient`, otherwise a `TransportClient`; default: `false`
 * `servers`: A list of servers for usage with the created TransportClient if `nodeClient` is `false`
 * `clusterName`: The name of the Elasticsearch cluster; default: "elasticsearch"
 * `settings`: Any additional settings for Elasticsearch, see [Configuration](https://www.elastic.co/guide/en/elasticsearch/reference/2.3/setup-configuration.html)
@@ -59,6 +59,17 @@ The order of precedence is: `nodeClient`/`servers`/`clusterName` > `settings` >
 any setting in `settingsFile` can be overwritten with `settings` which in turn get overwritten by the specific settings
 like `clusterName`.
 
+### Notes for Elasticsearch 5.x
+
+Elasticsearch 5 specifically recommends **not** using the NodeClient, and it has been disabled in this
+version of the connector.
+
+The preferred alternative is to launch a local coordinating node, with whichever plugins you require,
+and use the TransportClient to communicate with that. The coordinating node should join your cluster.
+
+See [Connecting a Client to a Coordinating Only Node](https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/client-connected-to-client-node.html)
+
+
 Maven Artifacts
 ---------------
 

src/test/java/io/dropwizard/elasticsearch/config/EsConfigurationTest.java

@@ -22,8 +22,8 @@ public class EsConfigurationTest {
             new DefaultConfigurationFactoryFactory<EsConfiguration>()
                     .create(EsConfiguration.class, validator, Jackson.newObjectMapper(), "dw");
 
-    @Test
-    public void defaultConfigShouldBeValid() throws IOException, ConfigurationException {
+    @Test(expected = ConfigurationException.class)
+    public void defaultConfigInvalid() throws IOException, ConfigurationException {
         configFactory.build();
     }