add local node to node builder

modules/elasticsearch/src/main/java/org/elasticsearch/node/NodeBuilder.java

@@ -116,6 +116,18 @@ public class NodeBuilder {
         return this;
     }
 
+    /**
+     * Is the node a local node. A local node is a node that uses a local (JVM level) discovery and
+     * transport. Other (local) nodes started within the same JVM (actually, class-loader) will be
+     * discovered and communicated with. Nodes outside of the JVM will not be discovered.
+     *
+     * @param local Should the node be local or not
+     */
+    public NodeBuilder local(boolean local) {
+        settings.put("node.local", true);
+        return this;
+    }
+
     /**
      * The cluster name this node is part of (maps to the <tt>cluster.name</tt> setting). Defaults
      * to <tt>elasticsearch</tt>.

plugins/attachments/src/test/java/org/elasticsearch/plugin/attachments/test/SimpleAttachmentIntegrationTests.java

@@ -47,7 +47,7 @@ public class SimpleAttachmentIntegrationTests {
     private Node node;
 
     @BeforeClass public void setupServer() {
-        node = nodeBuilder().settings(settingsBuilder().put("node.local", true)).node();
+        node = nodeBuilder().local(true).node();
     }
 
     @AfterClass public void closeServer() {