DefaultView failing test. Throws when req.Items["View"] doesn't exist.

```
ERROR|DtoUtils|ServiceBase<TRequest>::Service Exception|System.Collections.Generic.KeyNotFoundException: The 
given key was not present in the dictionary.
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at ServiceStack.ServiceInterface.DefaultViewAttribute.Execute(IHttpRequest req, IHttpResponse res, Object requestDto) in c:\code\github\ServiceStack\src\ServiceStack.ServiceInterface\DefaultViewAttribute.cs:line 22
   at ServiceStack.ServiceInterface.RequestFilterAttribute.RequestFilter(IHttpRequest req, IHttpResponse res, Object requestDto) in c:\code\github\ServiceStack\src\ServiceStack.ServiceInterface\RequestFilterAttribute.cs:line 41
   at ServiceStack.ServiceHost.ServiceRunner`1.Execute(IRequestContext requestContext, Object instance, TRequest request) in c:\code\github\ServiceStack\src\ServiceStack\ServiceHost\ServiceRunner.cs:line 111
```