* change nested element name from param to attribute
(now the same as scriptdef)
* expermintal testing for @attribute notation - controlled
by an attributeStyle attribute
* checking if correct attribute/element names are used
* samedefinition method overloaded
git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275105 13f79535-47bb-0310-9956-ffa450edef68