MOTIVATION:
* be able to generate xml logs from JUnit tests (can then be transformed to html)
* reuse as much code as available

IMPLEMENTATION:
* added <property name="junit.formatter.type" value="plain"/>
* added <property name="junit.formatter.extension" value=".txt"/>
* removed the default '.txt' junit logs extension
* changed the junit <formatter> to use junit.formatter.{type|extension} properties

USAGE:
* custom build file including the original one:
<project name="importing" basedir="." default="deploy">
  <import file="build.xml"/>
  <target name="test-xml">
    <antcall target="test">
      <param name="junit.formatter.type" value="xml"/>
      <param name="junit.formatter.extension" value=".xml"/>
    </antcall>
  </target>
</project>

Patch based on 'trunk' branch revision 1205789

Please change the 'Component' field if necessary. 'Packaging' seemed to be the most appropriate for build.xml changes.