Adding a CLI Test: Execute a 1.0 tool in a netcoreapp1.1 project

https://github.com/dotnet/cli/issues/6229

TestAssets/TestProjects/TestAppWithCLIToolReferences/Program.cs

@@ -0,0 +1,15 @@
+// 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 System;
+
+namespace ConsoleApplication
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+        }
+    }
+}