RESOURCE-532 create the unit tests and docs for azure my sql database server configuration

[soumyo13]

Description

Please describe what this change achieves. Ensure you have read the Contributing to InSpec document before submitting.

Issues Resolved

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

Check List

• [ ] New functionality includes tests
• [ ] All tests pass
• [ ] rake lint passes
• [ ] 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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