The constraint "Valid" does not accept any options or groups anymore. As per
JSR303 1.0 final, section 3.5.1 "Object graph validation" (page 39),
properties annotated with valid should be cascaded independent of the current
group (i.e. always). Thus the group "*" is not necessary anymore and was
removed from the "Valid" constraint in the Form validation.xml.
Added ability to specify **match-all** validation group, which
constraints will runs on every specified validation group.
Added groups="*" option to `Form::data` Valid validator.
