Upgrade Projects (#900)

* Upgrade Projects

* Push to trigger builds

* Tried Thread Sleep before deleting file

* FileDeleteTryCatch

* Updated from AspnetCore All to App

* Travis version Upgrade (.net core 2.2)

* dotnet 2.2.105

samples/OcelotKube/DownstreamService/Program.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+
+namespace DownstreamService
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            CreateWebHostBuilder(args).Build().Run();
+        }
+
+        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
+            WebHost.CreateDefaultBuilder(args)
+                .UseStartup<Startup>();
+    }
+}