Pull in the updated buildkite test script for InSpec
Pull in the updated buildkite test script for InSpec

The InSpec team did some work to improve the initial script. This should
help speed up builds.

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

chef/chef-dk,chef/chef-dk,chef/chef-dk