Reverse order xunit test cases

ReverseOrderTestCaseOrderer.cs

// apply assembly wide via [assembly: TestCaseOrderer("FullyNamespacedTypeName", "AssemblyName")]
public class ReverseOrderTestCaseOrderer : ITestCaseOrderer
{
    public IEnumerable<TTestCase> OrderTestCases<TTestCase>(IEnumerable<TTestCase> testCases) where TTestCase : ITestCase
    {
        var results = testCases.ToList();
        results.Reverse();
        return results;
    }
}