8209184: JCK Test Failure due to ResourceBundle

Reviewed-by: mchung
Contributed-by: adam.farley@uk.ibm.com

src/share/classes/java/util/ResourceBundle.java

@@ -1398,9 +1398,17 @@ public abstract class ResourceBundle {
             bundle = baseBundle;
         }
 
+        keepAlive(loader);
         return bundle;
     }
 
+    /**
+     * Keeps the argument ClassLoader alive.
+     */
+    private static void keepAlive(ClassLoader loader){
+        // Do nothing.
+    }
+
     /**
      * Checks if the given <code>List</code> is not null, not empty,
      * not having null in its elements.