We want the test framework with its client / server code and request
abstraction, but not the actual tests.
The actual tests in Xamarin.WebTests require a default
ServicePointManager.ServerCertificateValidationCallback to be
installed (which accepts the default server certificate).
We do not want to install this default callback in here because we
are using the per-request callbacks that were introduced in .NET 4.5.
The idea was to get rid of the extra Mono.Security.NewTls.TestProvider assembly and
have that code directly inside the console / android / ios app.
Unfortunately, this does not work with Xamarin.Forms because its assemblies are not
strong-named and we inherit a strong-name requirement from our dependencies.