Fix maven-jar-plugin version

Author: slandelle

pom.xml

@@ -226,6 +226,11 @@
 			<plugin>
 				<artifactId>maven-release-plugin</artifactId>
 			</plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>2.3.1</version>
+            </plugin>
 			<plugin>
 				<artifactId>maven-source-plugin</artifactId>
 				<version>2.1.2</version>