Traversing RESTWrapper with VirtualHostMonster raises KeyError

[oggers]

If you traverse /VirtualHostBase/http/localhost:8080/plone/folder1/VirtualHostRoot/folder2 it raises a KeyError in RESTWrapper.publishTraverse.
There should be consider a VirtualHostMonster the same as in RESTTraverse.publishTraverse.

I changed RESTWrapper.publishTraverse so that it works:

   def publishTraverse(self, request, name):                                                                                          
        # Try to get an object using default traversal                                                                                 
        adapter = DefaultPublishTraverse(self.context, request)                                                                        
        try:                                                                                                                           
            obj = adapter.publishTraverse(request, name)                                                                               
            if not IContentish.providedBy(obj) and not IService.providedBy(obj):                                                       
                if isinstance(obj, VirtualHostMonster):                                                                                
                    return obj                                                                                                         
                else:                                                                                                                  
                    raise KeyError

[petri]

@oggers could you try the https://github.com/plone/plone.rest/tree/simplify-traversal branch and let us know if it resolves this issue as well?