zvmsdk-wsgi validation of query methods validate the wrong parameters

[cao biao]

in validation/__init__.py:
this function:
if _schema_validation_helper(query_params_schema,
                             req.GET.dict_of_lists(),
                             args, kwargs, is_body=False)
the second parameter should be args[2] not req.GET.dict_of_lists（）
because the args[index](index to be determined, maybe fixed) is exactly the data we processed in handlers, just like 'userid_list' in following case:

@validation.query_schema(guest.userid_list_array_query)
    def inspect_stats(self, req, userid_list):
        info = self.client.send_request('guest_inspect_stats',
                                        userid_list)
        return info

and req.GET.dict_of_lists() are data passed from url, the value would be very weird.

This problem may effect every validation case of all the query methods.