[#2383] Improvement: Fix the warning that unchecked call to RecordsReader(RssConf,SerInputStream,Class<K>,Class<V>,boolean,boolean) as a member of the raw type RecordsReader

[#2383] Improvement: Fix the warning that unchecked call to RecordsReader(RssConf,SerInputStream,Class<K>,Class<V>,boolean,boolean) as a member of the raw type RecordsReader #7094