fixed false-positive serial version compatibility issue.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@4926 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/tasks/junit/TestObject.java

@@ -27,4 +27,6 @@ public abstract class TestObject implements ModelObject, Serializable {
     protected static String safe(String s) {
         return s.replace('/','_').replace(':','_');
     }
+
+    private static final long serialVersionUID = 1L;
 }