WIP: Increase default catalog polling interval to 4h (240m)

[oceanc80]

Description of the change:
Increases default catalog polling interval to 4h (240m) from 10m.

Motivation for the change:
Improves performance.

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

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[jianzhangbjz]

I think we also need to update the DefaultRegistryPollDuration for custom catalogsources.