CFINSPEC-79: Add linux container resource

[ahasunos]

Signed-off-by: Sonu Saha sonu.saha@progress.com

Description

ISSUE: CFINSPEC-79 — Add linux container resource.
'lxc' resourc allows testing if a linux container exists or is in running status.

Related Issue

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New content (non-breaking change)
• Breaking change (a content change which would break existing functionality or processes)

Changes made to existing file:

• test/helpers/mock_loader.rb

New files included for lxc resource:

• docs-chef-io/content/inspec/resources/lxc.md
• lib/inspec/resources/lxc.rb
• test/fixtures/cmd/lxcinfo
• test/unit/resources/lxc_test.rb

Checklist:

• I have read the CONTRIBUTING document.

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[chef-expeditor]

Hello ahasunos! 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!

[ahasunos]

@Vasu1105 or @clintoncwolfe
Please review the latest changes.