Fixing dotnet-test.Tests to use a portable test app - ProjectWithTests.

The ProjectWithTests needed to be moved outside of TestAssets\TestProjects because it can't be restored --infer-runtimes and it has to be built with netcoreapp1.0.

TestAssets/TestProjects/ProjectWithTests/GivenThatIWantSomeFakeTests.cs

@@ -1,22 +0,0 @@
-// Copyright (c) .NET Foundation and contributors. All rights reserved.
-// Licensed under the MIT license. See LICENSE file in the project root for full license information.
-
-using Xunit;
-
-namespace FakeTests
-{
-    public class GivenThatIWantSomeFakeTests
-    {
-        [Fact]
-        public void It_succeeds()
-        {
-            Assert.True(true);
-        }
-        
-        [Fact]
-        public void It_also_succeeds()
-        {
-            Assert.True(true);
-        }
-    }
-}