RESOURCE-538 Fix config cache and also fixed the lint errors

[sathish-progress]

Description

Please describe what this change achieves. Ensure you have read the Contributing to InSpec document before submitting. Inspec Config cache returns empty hash for test runs. Hence using a mock for test run

Issues Resolved

List any existing issues this PR resolves, or any Discourse or StackOverflow discussion that's relevant

Check List

• [ ] New functionality includes tests
• [X] All tests pass
• [X] rake lint passes
• [X] All commits have been signed-off for the Developer Certificate of Origin. See https://github.com/chef/chef/blob/master/CONTRIBUTING.md#developer-certification-of-origin-dco

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