WIP: Windows Event Log Support

[twangboy]

What does this PR do?

Adds support for the Windows Event Log. This is a backport from the develop branch.

What issues does this PR fix or reference?

Fixes:

Previous Behavior

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New Behavior

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Merge requirements satisfied?

[NOTICE] Bug fixes or features added to Salt require tests.

• [ ] Docs
• [ ] Changelog - https://docs.saltproject.io/en/master/topics/development/changelog.html
• [ ] Tests written/updated

Commits signed with GPG?

Yes/No

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