Allow custom authorized keys file

[mengesb]

Description

Add a property auth_keys to customize the filename for the user's authorized keys.

I feel this is a nice medium change, as modifying data bag content is data modification - and in a multi-os deployment or multi-environment scenario you may not always want to effectively hard-code the path or file name of the authorized keys file. This is more portable and wrapper friendly allowing users to make programmatic choices in providing this value to the custom resource.

I also fixed the opensuse test where the user created doesn't create a same-named group, but instead puts the user in the users group.

Issues Resolved

• 408

• 409

• 418

Check List

• [x] All tests pass. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/TESTING.MD
• [x] New functionality includes testing.
• [x] 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]

Closing in favor of #423 so we can do this directly in the data bag where it belongs