Support legacy Chef *_paths that are set in a Suite (not a provisioner).

This effectively will convert the following:

    ---
    suites:
    - name: foo
      data_path: /my/data
      data_bags_path: /my/data_bags
      environments_path: /my/environments
      nodes_path: /my/nodes
      roles_path: /my/roles

into:

    ---
    suites:
    - name: foo
      provisioner:
        data_path: /my/data
        data_bags_path: /my/data_bags
        environments_path: /my/environments
        nodes_path: /my/nodes
        roles_path: /my/roles

This will be supported in the near-term for backwards compatability,
then a future release will deprecate this legacy usage with a warning
when encountered, then the legacy support will be finally removed in
another release.