INT-2855 Fix Tail Test on Build Server

- Fix tail test
 - Fix 2 javadoc issues

spring-integration-core/src/main/java/org/springframework/integration/channel/registry/ChannelRegistry.java

@@ -42,7 +42,7 @@ public interface ChannelRegistry {
 
 	/**
 	 * Create a tap on an already registered inbound channel
-	 * @param the registered name
+	 * @param name the registered name
 	 * @param channel the channel that will receive messages from the tap
 	 */
 	void tap(String name, MessageChannel channel);