Add license gating to kitchen-inspec

[clintoncwolfe]

Describe the Enhancement:

Accept chef license when running InSpec via kitchen-inspec from Chef workstation. If running kitchen-inspec without a workstation install, apparently this is intended to run without license gating.

This is a major version change.

Describe the Need:

All InSpec 4+ users

[aaronlippold]

given that 4.0.8 does not allow for an escape hatch, should we prioritize this so we are not breaking kitchen ci/cd builds

[clintoncwolfe]

4.0.8 is not a full release; we should talk about 4.3.2 and later.

Here is the plan:

1. If you are calling Inspec::Runner yourself directly from your Ruby code, you are "using InSpec as a library" and are not subject to the license.
2. If you use kitchen-inspec (which calls Inspec::Runner) from your custom gem install, my current understanding is that this is also a non-licensed use. I may be wrong here.
3. If you use kicthen-inspec from a ChefDK or Chef Workstation installation, you will need to accept the license

So, we'll be adding code to kitchen-inspec to detect case 3 and prompt for license acceptance. Make sense?

[tas50]

#2 is correct based on our past conversations with product

[tas50]

Closing this out based on the library usage of inspec here.