Bugfix in iam access keys resource

[Rohit1509]

Signed-off-by: Rohit Joshi rohit.prasad.joshi@sap.com

Description

'lazy_load_last_used_hours_ago' function was never called (always 'nil') hence when it was referenced in 'lazy_load_last_used_days_ago' function this was giving an error if it had a non-nil value. This fix calls the function if it is previously nil.

Issues Resolved

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

Check List

Please fill box or appropriate ([x]) or mark N/A.

• [ ] New functionality includes integration tests/controls
• [ ] New Terraform resources
• [ ] Documentation provided or updated for resources
• [ ] All Integration Tests pass
• [ x] All Unit 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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