message: fix user privilege bug
diff: /*
  * @Author: wangjian
  * @Date: 2021-12-20 16:38:46
  - * @LastEditTime: 2022-09-16 10:31:15
  + * @LastEditTime: 2022-09-16 17:53:07
  * @LastEditors: wangjian 2606583267@qq.com
  * @Description: grpc util
  * @FilePath: /gstore/GRPC/APIUtil.cpp
  @@ -1375,8 +1375,6 @@ int APIUtil::clear_user_privilege(string username)
  it->second->export_priv.clear();
  pthread_rwlock_unlock(&(it->second->export_priv_set_lock));
  - refresh_sys_db();
  -
  pthread_rwlock_unlock(&users_map_lock);
  return 1;
  }
  @@ -1398,7 +1396,6 @@ bool APIUtil::del_privilege(const std::string& username, const std::string& type
  int del_result = 0;
  if(it != users.end())
  {
  - pthread_rwlock_unlock(&users_map_lock);
  if(type == "query" && it->second->query_priv.find(db_name) != it->second->query_priv.end())
  {
  string update = "DELETE DATA {<" + username + "> <has_query_priv> <" + db_name + ">.}";
  