Merge pull request #26 from Rocketmakers/initialize-race-condition

Fix bootstrap initialization race condition

Author: scott-xu

src/Ninject.Web.Common.OwinHost/OwinBootstrapper.cs

@@ -83,8 +83,9 @@ public async Task Execute(IOwinContext context, Func<Task> next)
                 {
                     if (this.bootstrapper == null)
                     {
-                        this.bootstrapper = new Bootstrapper();
-                        this.bootstrapper.Initialize(this.CreateKernel);
+                        var initializingBootstrapper = new Bootstrapper();
+                        initializingBootstrapper.Initialize(this.CreateKernel);
+                        this.bootstrapper = initializingBootstrapper;
                     }
                 }
             }