fixed XMLValidate task and test - see the kind of trouble we can get into using String for filename parameters?! :)

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272530 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -289,7 +289,6 @@
     <exclude name="${optional.package}/splash/*.java" unless="swing.present" />
   </patternset>
   <patternset id="teststhatfail">
-    <exclude name="${optional.package}/XmlValidateTest.java" unless="run.failing.tests" />
   </patternset>
 
   <!--

src/main/org/apache/tools/ant/taskdefs/optional/XMLValidateTask.java

@@ -490,7 +490,7 @@ public class XMLValidateTask extends Task {
                 return;
             }
 
-            File fileDTD = new File(location);
+            File fileDTD = project.resolveFile(location);
             if (fileDTD.exists()) {
                 if (publicId != null) {
                     fileDTDs.put(publicId, fileDTD);