use java 8 compatible clirr version and run clirr on travis

Author: PascalSchumacher

.travis.yml

@@ -22,7 +22,7 @@ jdk:
   - oraclejdk8
 
 script:
-  - mvn test apache-rat:check javadoc:javadoc
+  - mvn test apache-rat:check clirr:check javadoc:javadoc
 
 after_success:
   - mvn clean cobertura:cobertura coveralls:report

pom.xml

@@ -259,6 +259,8 @@ file comparators, endian transformation classes, and much more.
     </commons.osgi.export>
 
     <commons.scmPubCheckoutDirectory>site-content</commons.scmPubCheckoutDirectory>
+    <!-- Override clirr version to be able to build the site on Java 8 -->
+    <commons.clirr.version>2.8</commons.clirr.version>
   </properties>
 
   <build>