Ensure proper formatting of IPs and IP prefixes.

[m-appel]

Enforce format with property formatter and fix all crawlers that break this. Also refactor the nro.delegated_stats crawler to improve performance and fix incorrect prefixes.

We decided to not enforce ISO values for country codes.

Closes #87 Closes #112

How Has This Been Tested?

Ran all crawlers that create IP and Prefix nodes

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.