kaiax/supply: Expect Initialize to be called by mock (Fix CI)

[ian0371]

Proposed changes

Fix CI failures such as this

Types of changes

• [x] Bugfix
• [ ] New feature or enhancement
• [ ] Others

Checklist

• [x] I have read the CONTRIBUTING GUIDELINES doc
• [x] I have read the CLA and signed by comment I have read the CLA Document and I hereby sign the CLA in first time contribute
• [ ] Lint and unit tests pass locally with my changes ($ make test)
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)
• [ ] Any dependent changes have been merged and published in downstream modules