Add maven-source-plugin to test-data

Author: ibacher

test-data/pom.xml

@@ -13,6 +13,10 @@
 
     <build>
         <plugins>
+            <plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-source-plugin</artifactId>
+			</plugin>
             <plugin>
                 <groupId>org.commonjava.maven.plugins</groupId>
                 <artifactId>directory-maven-plugin</artifactId>