Test Fix (#306)

test/AspNetCoreModule.Test/Framework/TestWebSite.cs

@@ -383,6 +383,7 @@ namespace AspNetCoreModule.Test.Framework
                 // Create apppool
                 if (IisServerType == ServerType.IIS)
                 {
+                    iisConfig.DeleteAppPool(appPoolName);
                     iisConfig.CreateAppPool(appPoolName);
                     iisConfig.SetAppPoolSetting(appPoolName, "rapidFailProtectionMaxCrashes", 100);