Added property strict_subscription_association

[heintonny]

Added property and variable for strict_subscription_association to caf_eslz add-on module

Issue-id

PR Checklist

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• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [X] My code follows the code style of this project.
• [X] I ran lint checks locally prior to submission.
• [ ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Description

Does this introduce a breaking change

• [ ] YES
• [X] NO

Testing