Add missing TestAssets projects to Hosting.sln (#1352)
Add missing TestAssets projects to Hosting.sln (#1352)

* Reaction to #1333

aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore