Don't build packages for EOL Debian 8

[tas50]

Debian 8 is out of support and we shouldn't produce packages for it anymore.

Signed-off-by: Tim Smith tsmith@chef.io

[netlify]

Deploy preview for chef-inspec ready!

Built with commit 78b3020

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[chef-expeditor]

Hello tas50! Thanks for the pull request!

Here is what will happen next:

1. Your PR will be reviewed by the maintainers.
2. Possible Outcomes
   a. If everything looks good, one of them will approve it, and your PR will be merged.
   b. The maintainer may request follow-on work (e.g. code fix, linting, etc). We would encourage you to address this work in 2-3 business days to keep the conversation going and to get your contribution in sooner.
   c. Cases exist where a PR is neither aligned to Chef InSpec's product roadmap, or something the team can own or maintain long-term. In these cases, the maintainer will provide justification and close out the PR.

Thank you for contributing!

[tas50]

I fixed the windows hab failures in another PR