Move https://github.com/aspnet/AspNetCore.Docs/pull/12150 to this repo. Decide what is worth keeping. @Rick-Anderson will do the migration. [Internal review URL](https://review.docs.microsoft.com/en-us/aspnet/core/web-api/advanced/odata-security?view=aspnetcore-2.2&branch=pr-en-us-12150) [OData Expand](https://review.docs.microsoft.com/en-us/aspnet/core/web-api/advanced/odata-expand?view=aspnetcore-1.0&branch=pr-en-us-12150)