Your checklist for this pull request

• I've read the contributing guideline.
• I've tested my changes by building and running the project, and testing changed functionality (if applicable)
• I've added automated tests for my change (if applicable, optional)
• I've updated documentation to reflect my change (if applicable)

What is the current behaviour?

If MWDB can't load Karton producer on load time, it gives up completely and marks it as unavailable

What is the new behaviour?

When Karton is enabled, we try to load it on every request until it succeeds.

Test plan

Closing issues

related with #891