We rely on a system python installation with the correct python
libraries.  To improve the chances that the python interpreter we call
has the yum libary available, we use the same interpreter as yum uses.

Fixes #3143

This reverts commit 4b0f63b90cc72365fccd3f4f2e07721de7af80e6, reversing
changes made to b023ada18ed90bb9d2545760f93e6210e083dc8d.

This reverts commit 2603e2153d6ab50179d2278025a51579edb9033f, reversing
changes made to a7f5c92960aedf8d5bfc71abbce430ab075e016a.

Conflicts:
	CHANGELOG.md

Cookbook artifacts differ in these ways:
* the name field is the cookbook name instead of name+version
* there is no "cookbook_name" field
* cookbook artifacts don't have a json_class when downloaded from the
  server
* there is an identifier field

cmdlet.rb uses stream redirection, which is not available in
powershell 2. Since this is a helper class for our `dsc_script`
and `dsc_resource`, this is a fairly safe change.

While the verbose stream redirection is currently unused, it
will be useful if Invoke-DscResource logs its verbose output
to the verbose stream.

DscResource in core chef

Fix openbsd package provider