code: function addModuleToParentPom (parentPomPath, properties, yoFs) {
    var pomStr = yoFs.read(parentPomPath);
    var pomEditor = mavenPomModule(pomStr);
    pomEditor.addModule(properties.artifactId);
    yoFs.write(parentPomPath, pomEditor.getPOMString());
  }
docs: When a child module is instantiated we need to make sure the parent pom references
  the child.
  
  @param {!string} parentPomPath
  @param {!Object} properties
  @param {!Object} yoFs