Upgrade maven-javadoc-plugin to 2.10.3

Change-Id: I6ee028423338a41dac27d8a1e8f967473fc32ae8

pom.xml

diff --git a/pom.xml b/pom.xml
index b900340..4023d0c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -350,7 +350,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
-        <version>2.9.1</version>
+        <version>2.10.3</version>
         <configuration>
           <encoding>UTF-8</encoding>
           <quiet>true</quiet>