Repository vendor value must be updated

The RepositoryDecorator class provides "Repository Vendor" information, which is currently "Hippo B.V.". This legal organisation does not exist anymore, so it must be updated. Personally I am not sure what the new value should be.

Next to that: this value is shown in the CMS in th Admin / System Information. I don't know why that would be useful information. If there is no reason to show it there, please remove it. This needs a separate CMS issue.