StopServer before asserting TestSink (#1416)

test/IISExpress.FunctionalTests/InProcess/StartupTests.cs

@@ -97,6 +97,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
             var deploymentResult = await DeployAsync(deploymentParameters);
             await deploymentResult.AssertStarts();
 
+            StopServer();
             // Verify that in this scenario where.exe was invoked only once by shim and request handler uses cached value
             Assert.Equal(1, TestSink.Writes.Count(w => w.Message.Contains("Invoking where.exe to find dotnet.exe")));
         }

test/IISExpress.FunctionalTests/OutOfProcess/GlobalVersionTests.cs

@@ -184,6 +184,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
 
         private void AssertLoadedVersion(string version)
         {
+            StopServer();
             Assert.Contains(TestSink.Writes, context => context.Message.Contains(version + @"\aspnetcorev2_outofprocess.dll"));
         }