Add 2016 to Docs Copyright

Close `CuratorFramework` in the `@AfterClass` for `LeaderInitiatorFactoryBeanTests` with the hope to overcome
hanging on the CI server: https://build.spring.io/browse/INT-AT42SIO-75/

spring-integration-zookeeper/src/test/java/org/springframework/integration/zookeeper/config/LeaderInitiatorFactoryBeanTests.java

@@ -25,6 +25,7 @@ import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
 import org.apache.curator.framework.CuratorFramework;
+import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -66,6 +67,13 @@ public class LeaderInitiatorFactoryBeanTests extends ZookeeperTestSupport {
 		client = createNewClient();
 	}
 
+	@AfterClass
+	public static void closeClient() {
+		if (client != null) {
+			client.close();
+		}
+	}
+
 	@Test
 	public void test() throws Exception {
 		assertTrue(this.config.latch1.await(10, TimeUnit.SECONDS));

src/reference/asciidoc/index-docinfo.xml

@@ -48,6 +48,7 @@
       <year>2013</year>
       <year>2014</year>
       <year>2015</year>
+      <year>2016</year>
       <holder>
           Pivotal Software, Inc. All Rights Reserved.
       </holder>