Create agent IDs mapper

references covid19/pdyn2-stack#344

bento-config/src/main/java/net/snowyhollows/bento/config/DefaultWorkDir.java

@@ -41,6 +41,11 @@ public class DefaultWorkDir implements WorkDir {
         }
     }
 
+    @Override
+    public File absolutizeFile(File file) {
+        return absolutize(file);
+    }
+
     @Override
     public File[] listFiles(File dir, FileFilter fileFilter) {
         return absolutize(dir).listFiles(fileFilter);