refactor(test): rename test_lib to testing

Old test_lib is now testing_internal
test_lib_public is now testing

modules/angular2/test.ts

@@ -1,13 +1,5 @@
 /**
- * @module
- * @description
- * This module is used for writing tests for applications written in Angular.
- *
- * This module is not included in the `angular2` module; you must import the test module explicitly.
- *
+ * @deprecated Please use testing instead
  */
-export * from './src/test_lib/test_lib_public';
-export * from './src/test_lib/test_component_builder';
-export * from './src/test_lib/test_injector';
-export * from './src/test_lib/fake_async';
-export * from './src/test_lib/utils';
+
+export * from './testing';