When a request /classes/{product class} does not match an existing product class, I want a 404 error.

[tloubrieu-jpl]

Checked for duplicates

No - I haven't checked

🐛 Describe the bug

When I did /classes/collections action, I got a 400 error.

🕵️ Expected behavior

The integration tests expect a 404 error.

📜 To Reproduce

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🖥 Environment Info

• Version of this software [e.g. vX.Y.Z]
• Operating System: [e.g. MacOSX with Docker Desktop vX.Y]
  ...

📚 Version of Software Used

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🩺 Test Data / Additional context

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🦄 Related requirements

🦄 #xyz

⚙️ Engineering Details

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🎉 Integration & Test

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