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

#668 - Adding tests for a couple of Controllers in the sample.
What piece of code is reading from this? is it this? https://github.com/aspnet/Configuration/blob/dev/src/Microsoft.Framework.ConfigurationModel/PathResolver.cs#L23

I'm opening a bug here. This should improved.


That said, if this is required for the sample, then it should work for all of our test projects. What happens if I add a configuration to one of the others?