[DB] added GetLiveFilesMetaData and DeleteFile
[DB] added GetLiveFilesMetaData and DeleteFile

Ingeniosity/rdb,pippio/gorocksdb,arbortech/gorocksdb,pippio/gorocksdb,unigraph/rdb,venugopalkandru/gorocksdb,daaku/gorocksdb,tecbot/gorocksdb,rdallman/gorocksdb,rdallman/gorocksdb,rdallman/gorocksdb,daaku/gorocksdb,tecbot/gorocksdb,arbortech/gorocksdb,unigraph/rdb,unigraph/rdb,rdallman/gorocksdb,venugopalkandru/gorocksdb,Ingeniosity/rdb