added maven artifact name

modules/activiti-dmn-json-converter/pom.xml

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
+	<name>Activiti - DMN JSON Converter</name>
 	<artifactId>activiti-dmn-json-converter</artifactId>
 	<parent>
 		<groupId>org.activiti</groupId>