Removal of users from groups via simple data bag entry

[cringdahl]

Description

You can now remove users from groups via the users cookbook. Simply add "old_groups" to your user data bag, add the group you want removed, and remove the old group from "groups", and converge.

Checks:

• "old_groups" is optional in the data bag.
• If a group is mentioned in "groups" and "old_groups", the user is still removed after a chef-client run.

Check List

• [ ] All tests pass. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/TESTING.MD
  • No automated tests are passing for 'users' at this point, but I have verified the change in kitchen.
• [x] New functionality includes testing.
• [ ] New functionality has been documented in the README if applicable
• [x] 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]

@cringdahl If you're still interested in adding this can you rebase it against the current state of the cookbook and add to the readme showing how you would use this functionality. It seems pretty useful, but without documentation no one will find it.

[tas50]

I'm going to close this out since the change has diverged from master and we haven't heard back about a rebase. If this is still something you want to get merged in please open a new PR against the current master state.