Converting flags in binlog_reader into BinlogReader parameters.
Converting flags in binlog_reader into BinlogReader parameters.

LGTM Shruti.

nso95/vitess,fanngyuan/vitess,nso95/vitess,fanngyuan/vitess,fanngyuan/vitess,fanngyuan/vitess,nso95/vitess,fanngyuan/vitess,nso95/vitess,nso95/vitess