Remove blank lines at start/end of files

SA1517, SA1518

src/Ocelot/Authentication/Middleware/AuthenticationMiddleware.cs

@@ -63,4 +63,3 @@ namespace Ocelot.Authentication.Middleware
         }
     }
 }
-

src/Ocelot/Configuration/File/FileGlobalConfiguration.cs

@@ -1,5 +1,4 @@
-
+namespace Ocelot.Configuration.File
-namespace Ocelot.Configuration.File
 {
     public class FileGlobalConfiguration
     {

src/Ocelot/Request/Mapper/RequestMapper.cs

@@ -92,4 +92,3 @@
         }
     }
 }
-

test/Ocelot.AcceptanceTests/CannotStartOcelotTests.cs

@@ -1,4 +1,3 @@
-
 using System;
 using System.Collections.Generic;
 using Microsoft.AspNetCore.Hosting;