We should be able to skip the legacy conversion--ideally I'd like almost all the Chef-related config to go under a provisioner block like:

```yaml
---
driver:
  name: vagrant

provisioner:
  name: chef_solo
  cookbooks_path:
    - cookbooks
    - site-cookbooks

platforms:
  - name: ubuntu-12.04

suites:
  - name: default
```