Nested partials is not working as expected

[kratiahuja]

Related issues:

emberjs/ember.js#15791

Steps to reproduce

The parent template context isn't being passed down to partials that are nested. It is only being passed down to the first partial that is being invoked

Example:

// main.hbs
{{#each model as |record index|}}
  {{partial 'my-partials/some-partials'}}
{{/each}}

// my-partials/some-partials.hbs
<p>record id: {{record.id}} </p>
{{partial 'my-partials/name'}}

// my-partials/name.hbs
<p> record name: {{record.name}}</p>

In the name.hbs partial, the record is undefined.

Expected result:

Rendered template should be:

record id: 1
record name: foo

Actual result

record id: 1
record name: 

[GavinJoyce]

Fix here: #730