Updating javadoc plugin to version 2.9.1

Author: gm2552

pom.xml

@@ -179,7 +179,7 @@
 			<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>
@@ -227,7 +227,7 @@
 			<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>