INTEXT-64 - Polishing

* Update dependency versions
* Add more comments/links
* Remove DocBook usage

spring-integration-mqtt/src/test/java/org/springframework/integration/mqtt/BackTobackAdapterTests.java

@@ -31,7 +31,7 @@ import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
 
 /**
  * @author Gary Russell
- * @since 3.0
+ * @since 1.0
  *
  */
 public class BackTobackAdapterTests {

spring-integration-mqtt/src/test/java/org/springframework/integration/mqtt/BrokerRunning.java

@@ -32,7 +32,7 @@ import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;
 
 /**
  * @author Gary Russell
- * @since 3.0
+ * @since 1.0
  *
  */
 public class BrokerRunning extends TestWatcher {

spring-integration-mqtt/src/test/java/org/springframework/integration/mqtt/MqttAdapterTests.java

@@ -53,7 +53,7 @@ import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
 
 /**
  * @author Gary Russell
- * @since 3.0
+ * @since 1.0
  *
  */
 public class MqttAdapterTests {

spring-integration-mqtt/src/test/java/org/springframework/integration/mqtt/config/xml/MqttMessageDrivenChannelAdapterParserTests.java

@@ -32,7 +32,7 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 /**
  * @author Gary Russell
- * @since 3.0
+ * @since 1.0
  *
  */
 @ContextConfiguration

spring-integration-mqtt/src/test/java/org/springframework/integration/mqtt/config/xml/MqttOutboundChannelAdapterParserTests.java

@@ -35,7 +35,7 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 /**
  * @author Gary Russell
- * @since 3.0
+ * @since 1.0
  *
  */
 @ContextConfiguration