Various Docs build fixes

https://build.spring.io/browse/INT-MASTER-1568/

* Fix `whats-new.adoc` for broken link
* remove `logDocuments = true` from the `build.gradle`
* Change the Gradle task name in the `.travis.yml` for consistency

.travis.yml

@@ -15,4 +15,4 @@ install: true
 env:
   - TERM=dumb SI_FATAL_WHEN_NO_BEANFACTORY=true NO_REFERENCE_TASK=true
 script:
-    - ./gradlew check checkAsciiDocLinks --refresh-dependencies --no-daemon
+    - ./gradlew check checkAsciidocLinks --refresh-dependencies --no-daemon

build.gradle

@@ -900,7 +900,6 @@ task('makePDF', type: org.asciidoctor.gradle.AsciidoctorTask) {
 		include 'index-single.adoc'
 	}
 	options doctype: 'book', eruby: 'erubis'
-	logDocuments = true
 	attributes 'icons': 'font',
 		'sectanchors': '',
 		'sectnums': '',
@@ -919,7 +918,6 @@ asciidoctor {
 		}
 	}
 	options doctype: 'book', eruby: 'erubis'
-	logDocuments = true
 	attributes 'docinfo': 'shared',
 		// use provided stylesheet
 		stylesdir: "css/",

src/reference/asciidoc/whats-new.adoc

@@ -43,7 +43,7 @@ The `splitter` now supports a `discardChannel` configuration option.
 See <<./splitter.adoc#splitter,Splitter>> for more information.
 
 The Control Bus can now handle `Pausable` (extension of `Lifecycle`) operations.
-See <<control-bus>> for more information.
+See <<./control-bus.adoc#control-bus,Control Bus>> for more information.
 
 [[x5.2-amqp]]
 ==== AMQP Changes