cql: token_restriction: Fix range produced for contradicting restrictions

We want to return no results in this case, so we should return no
range instead of range open on both sides, which yields all data.

cql3/restrictions/token_restriction.hh

@@ -99,7 +99,7 @@ public:
         if (start_token > end_token
                 || (start_token == end_token
                     && (!include_start || !include_end))) {
-            return {query::partition_range::make_open_ended_both_sides()};
+            return {};
         }
 
         typedef typename bounds_range_type::bound bound;