ROO Error when multimodule child project doen't have version tag

Having a multimodule project, ROO shows an error if some child project doesn't have version tag.

Maven accepts this syntax as we can see on http://maven.apache.org/pom.html#Inheritance but ROO is showing an EXCEPTION.

Modify ROO validation to gets parent version if child project doesn't have it. If parent doesn't have version tag, or parent tag, shows an ERROR.