Updating Microsoft.AspNet.Mvc.Core.Test to work on Mono

These tests were a bit broken in Mvc. I think the intention of the test was to verify the values in the dictionary, however since it was an `IDictionary<string, string>`, we ended up treating it as a regular object and reflecting on it as part of the `TypeHelper.ObjectToDictionary` call. The resulting dictionary looked like `{ { "Count", 1}, { Keys, KeyCollection<string>}, ...` and the comparison of these values was failing in Mono.