take advantage of caching in Resources

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@806579 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Concat.java

@@ -642,6 +642,7 @@ public class Concat extends Task implements ResourceCollection {
         if (!(rc instanceof Resources)) {
             Resources newRc = new Resources();
             newRc.setProject(getProject());
+            newRc.setCache(true);
             newRc.add(rc);
             rc = newRc;
         }

src/main/org/apache/tools/ant/taskdefs/PathConvert.java

@@ -199,6 +199,7 @@ public class PathConvert extends Task {
     private synchronized Resources getPath() {
         if (path == null) {
             path = new Resources(getProject());
+            path.setCache(true);
         }
         return path;
     }

src/main/org/apache/tools/ant/taskdefs/optional/junit/BatchTest.java

@@ -54,6 +54,7 @@ public final class BatchTest extends BaseTest {
      */
     public BatchTest(Project project) {
         this.project = project;
+        resources.setCache(true);
     }
 
     /**