Fix broken ant build - thanks to Gary Gregory

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1006294 13f79535-47bb-0310-9956-ffa450edef68

Author: Niall Pemberton

build.xml

@@ -193,6 +193,7 @@
           <exclude name="**/testtools/**"/>
           <!-- Ant JUnit does not handle abstract classes -->
           <exclude name="**/*AbstractTestCase*"/>
+            <exclude name="**/Abstract*TestCase*"/>
         </fileset>
       </batchtest>
     </junit>