Don not shuffle replicas for LWT queries

Author: sylwiaszunejko

cassandra/policies.py

@@ -523,7 +523,7 @@ def make_query_plan(self, working_keyspace=None, query=None):
         else:
             replicas = self._cluster_metadata.get_replicas(keyspace, query.routing_key)
 
-        if self.shuffle_replicas:
+        if self.shuffle_replicas and not query.is_lwt():
             shuffle(replicas)
 
         def yield_in_order(hosts):