Can't target tests in .NET Core nested types

[jcansdale]

For example, targeting the class Nested would silently fail:

    public class Tests
    {
        [Test]
        public void Fail()
        {
            Assert.AreEqual(1, 2);
        }

        public class Nested
        {
            [Test]
            public void Fail()
            {
                Assert.AreEqual(1, 2);
            }
        }
    }

[jcansdale]

Released with TestDriven.NET-4.0-alpha.