Updating javadoc plugin to version 2.9.1

Author: gm2552

pom.xml

@@ -327,7 +327,7 @@
         <plugin>
 	      	<groupId>org.apache.maven.plugins</groupId> 
 	        <artifactId>maven-javadoc-plugin</artifactId>
-	        <version>2.6.1</version>
+	        <version>2.9.1</version>
 	        <configuration>
 			    <additionalparam>-Xdoclint:none</additionalparam>
 				<charset>UTF-8</charset>
@@ -378,7 +378,7 @@
 	      <plugin>
 	      	<groupId>org.apache.maven.plugins</groupId> 
 	        <artifactId>maven-javadoc-plugin</artifactId>
-	        <version>2.6.1</version>
+	        <version>2.9.1</version>
 	        <configuration>
 			    <additionalparam>-Xdoclint:none</additionalparam>
 				<charset>UTF-8</charset>