Fix compiler warnings and move docbook build to a profile

spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/MultiClientTests.java

@@ -115,10 +115,6 @@ public class MultiClientTests {
 		adapter.stop();
 	}
 
-	/**
-	 * @param i
-	 * @return
-	 */
 	private String largePayload(int n) {
 		StringBuilder sb = new StringBuilder(n);
 		for (int i = 0; i < n; i++) {

spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/TcpReceivingChannelAdapterTests.java

@@ -23,7 +23,6 @@ import static org.junit.Assert.fail;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.Socket;
-import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;

spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/connection/TcpNioConnectionTests.java

@@ -25,16 +25,11 @@ import java.net.ServerSocket;
 import java.net.Socket;
 import java.net.SocketTimeoutException;
 import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.TimeoutException;
-
 import javax.net.ServerSocketFactory;
 
 import org.junit.Test;
-import org.springframework.integration.core.Message;
 import org.springframework.integration.ip.util.SocketUtils;
 import org.springframework.integration.message.MessageBuilder;
 

spring-integration-ip/src/test/java/org/springframework/integration/ip/udp/MultiClientTests.java

@@ -173,10 +173,6 @@ public class MultiClientTests {
 		adapter.stop();
 	}
 
-	/**
-	 * @param i
-	 * @return
-	 */
 	private String largePayload(int n) {
 		StringBuilder sb = new StringBuilder(n);
 		for (int i = 0; i < n; i++) {