add missing App::uses()

lib/Cake/Test/test_app/Model/Datasource/Session/TestAppLibSession.php

@@ -3,6 +3,9 @@
  * Test suite app/Model/Datasource/Session session handler
  *
  */
+
+App::uses('CakeSessionHandlerInterface', 'Model/Datasource/Session');
+
 class TestAppLibSession implements CakeSessionHandlerInterface {
 
 	public function open() {

lib/Cake/Test/test_app/Plugin/TestPlugin/Model/Datasource/Session/TestPluginSession.php

@@ -2,6 +2,9 @@
 /**
  * Test suite plugin session handler
  */
+
+App::uses('CakeSessionHandlerInterface', 'Model/Datasource/Session');
+
 class TestPluginSession implements CakeSessionHandlerInterface {
 
 	public function open() {