Fix issue rendering tagless container views.

Need a bit of help tracking this down.  Hoping that @krisselden has some ideas here.

Recieving the following errors from these tests.

* Inserting:

```
Source:         
Error: Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.
    at Error (native)
    at Morph._updateNode (http://localhost:5200/ember.js:54972:14)
    at Morph._update (http://localhost:5200/ember.js:54953:14)
    at Morph.insert (http://localhost:5200/ember.js:55033:13)
    at EmberRenderer.Renderer_insertElement [as insertElement] (http://localhost:5200/ember.js:12458:53)
    at EmberRenderer.Renderer_renderTree [as renderTree] (http://localhost:5200/ember.js:12334:12)
    at Object.merge.ensureChildrenAreInDOM (http://localhost:5200/ember.js:45434:22)
    at View.extend._ensureChildrenAreInDOM (http://localhost:5200/ember.js:45397:27)
    at Queue.invoke (http://localhost:5200/ember.js:840:18)
    at Object.Queue.flush (http://localhost:5200/ember.js:905:13)
```

* Removing:

```
Error: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node.
    at Error (native)
    at clear (http://localhost:5200/ember.js:55130:16)
    at Morph.replace (http://localhost:5200/ember.js:55065:9)
    at Morph.removeMorph (http://localhost:5200/ember.js:54913:16)
    at Morph.destroy (http://localhost:5200/ember.js:54903:20)
    at EmberRenderer.Renderer_remove [as remove] (http://localhost:5200/ember.js:12434:15)
    at EmberObject.extend.destroy (http://localhost:5200/ember.js:45559:26)
    at apply (http://localhost:5200/ember.js:21879:32)
    at superWrapper (http://localhost:5200/ember.js:21453:15)
    at apply (http://localhost:5200/ember.js:21879:32)
```