[BUGFIX beta] Avoid storing container on the prototype.

In order to support `this.container` (deprecated since 2.3) being available
to objects for backwards compatibility, we define the `container` property
on all classes that we instantiate via normal DI APIs.

The bulk of the work to support this was done in prior refactorings. This
change is targetted at ensuring that we do not leak the container instance
onto the object's prototype in the `CONTAINER_OVERRIDE` slot.

After these changes, we still support all of the APIs that we supported
previously, but will fallback to the current objects owner `__container__`
property (instead of storing it on the prototype directly).

Also, the test being updated here was not providing the `owner` to the
container in the unit test. This test being changed was previously only
doing part of the required setup for creating a `registry` / `container` /
`owner` group.

(cherry picked from commit 4cd5b80)

packages/container/lib/container.js

@@ -3,6 +3,7 @@ import {
   dictionary,
   symbol,
   setOwner,
+  getOwner,
   OWNER,
   assign,
   NAME_KEY,
@@ -569,7 +570,7 @@ const INJECTED_DEPRECATED_CONTAINER_DESC = {
   enumerable: false,
   get() {
     deprecate('Using the injected `container` is deprecated. Please use the `getOwner` helper instead to access the owner of this object.', false, { id: 'ember-application.injected-container', until: '3.0.0', url: 'http://emberjs.com/deprecations/v2.x#toc_injected-container-access' });
-    return this[CONTAINER_OVERRIDE];
+    return this[CONTAINER_OVERRIDE] || getOwner(this).__container__;
   },
 
   set(value) {
@@ -585,7 +586,6 @@ const INJECTED_DEPRECATED_CONTAINER_DESC = {
 function injectDeprecatedContainer(object, container) {
   if ('container' in object) { return; }
   Object.defineProperty(object, 'container', INJECTED_DEPRECATED_CONTAINER_DESC);
-  object[CONTAINER_OVERRIDE] = container;
 }
 
 function eachDestroyable(container, callback) {

packages/container/tests/container_test.js

@@ -553,8 +553,9 @@ QUnit.test('An object with its owner pre-set should be returned from ownerInject
 });
 
 QUnit.test('A deprecated `container` property is appended to every object instantiated from an extendable factory', function() {
+  let owner = { };
   let registry = new Registry();
-  let container = registry.container();
+  let container = owner.__container__ = registry.container({ owner });
   let PostController = factory();
   registry.register('controller:post', PostController);
   let postController = container.lookup('controller:post');