[MPOM-144] Upgrade maven-javadoc-plugin to 2.10.4.

git-svn-id: https://svn.apache.org/repos/asf/maven/pom/trunk@1774819 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/asf/pom.xml b/asf/pom.xml
index cd4693b..cc0d7b2 100644
--- a/asf/pom.xml
+++ b/asf/pom.xml
@@ -193,7 +193,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
-          <version>2.10.3</version>
+          <version>2.10.4</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>