HADOOP-13671. Fix ClassFormatException in trunk build. Contributed by Kihwal Lee.

hadoop-project/pom.xml

@@ -114,7 +114,7 @@
     <maven-jar-plugin.version>2.5</maven-jar-plugin.version>
     <maven-war-plugin.version>2.4</maven-war-plugin.version>
     <maven-source-plugin.version>2.3</maven-source-plugin.version>
-    <maven-project-info-reports-plugin.version>2.7</maven-project-info-reports-plugin.version>
+    <maven-project-info-reports-plugin.version>2.9</maven-project-info-reports-plugin.version>
     <maven-pdf-plugin.version>1.2</maven-pdf-plugin.version>
     <maven-remote-resources-plugin.version>1.5</maven-remote-resources-plugin.version>
     <build-helper-maven-plugin.version>1.9</build-helper-maven-plugin.version>