Transfer cake-dotnet-vulnerability-scanner and cake-cloudformation to cake-contrib

[zahycs]

Hi @augustoproiete

Thanks for reaching out through email, We would like to transfer these 2 repos to cake_contrib

1. https://github.com/epbloxx/cake-cloudformation
2. https://github.com/epbloxx/cake-dotnet-vulnerability-scanner

[augustoproiete]

Thanks @zahycs I sent you instructions via email.