Add in ROLE attribute so easy to reference.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269134 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/myrmidon/aspects/AspectHandler.java

@@ -21,6 +21,8 @@ import org.apache.myrmidon.api.TaskException;
  */
 public interface AspectHandler
 {
+    String ROLE = "org.apache.myrmidon.aspects.AspectHandler";
+
     Configuration preCreate( Configuration taskModel )
         throws TaskException;