Enable test for task container property setting

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@274376 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -302,7 +302,6 @@
   <patternset id="teststhatfail">
     <exclude name="${optional.package}/BeanShellScriptTest.java"/>
     <exclude name="${ant.package}/taskdefs/ImportTest.java"/>
-    <exclude name="${ant.package}/TaskContainerTest.java"/>
   </patternset>
 
   <!--