Remove insideGroup tests.

`templateData` has been removed from Views created with `{{with}}`.
Merge pull request #131 from rwjblue/remove-template-data-access-in-tests

Remove {{liquid-with}} insideGroup tests.
Ensure closing tags are present.

The original HTML is valid, but while testing/working on HTMLBars
versions of the helpers I discovered an issue where all tags were
expected to be closed.

This enables the project to build in HTMLBars.