add todir on batchtest to save reports

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@233431 13f79535-47bb-0310-9956-ffa450edef68

maven-plugins/maven-ant-plugin/src/main/java/org/apache/maven/plugin/ant/AntBuildWriter.java

@@ -167,6 +167,7 @@ public class AntBuildWriter
             writer.endElement(); // classpath
 
             writer.startElement( "batchtest" );
+            writer.addAttribute( "todir", "${maven.test.reports}" );
             for ( Iterator i = testCompileSourceRoots.iterator(); i.hasNext(); )
             {
                 writer.startElement( "fileset" );