System to run Chef Infra target mode for multiple nodes

[tas50]

Target mode is part of a larger solution for managing infrastructure where you can't install a Chef Infra Client. For the complete solution to work as expected we still need these remote systems to execute Chef Infra on a schedule and send their data to Infra Server / Automate. In order to achieve this we need the ability for a node to proxy Chef Infra target node runs.

Basic Idea

• Multiple client.rb files are stored in some new .d directory in /etc/chef
• Mutliple client.pem files will exist for these nodes
• When Chef Infra Client runs it loads all of the client.rb files and executes multiple target mode runs with standard Chef Infra Server checkins/ reporting.

[tas50]

Closing this in favor of https://chefio.atlassian.net/browse/INFC-38