Fix chef_org admin idempotency

[bkonick]

Description

This fixes idempotency for admins in the chef_org resource. It uses knife show to get the list of users in the admin group for a given org.

Check List

• All tests pass. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/TESTING.MD
• All commits have been signed for the Developer Certificate of Origin. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/CONTRIBUTING.MD

[tas50]

This really shouldn't be done by parsing knife. That's going to be super problematic and brittle. You'll want to hit the server API directly and parse out that output from there.

[bkonick]

Fair enough. I was sort of following the pattern of parsing output in some other parts of the same resource but I'll rework it to hit the API.