New Mock Credentials Planning

[kayaelle]

Planning for new mock credentials is in this document: https://docs.google.com/document/d/16zvVaRNGR9-0pbOq9P9WK6snY6KDEh2_vruX6FLM1uM/edit

Please add your ideas and content before August 4

[alexfigtree]

Closing this in favor of #571