Issue #668: Sample should be covered by a basic functional test.

#668 - Adding tests for a couple of Controllers in the sample.
The place where we detect if we have to use `AutoFac` or not uses this. The `AddJsonFile` in Startup.cs:
```C#
var configuration = new Configuration().AddJsonFile(@"App_Data\config.json")
```
This cannot be a part of `TestHelper.CreateServices` because this is very specific to this particular sample.