SEG-7223 Update last_checkpoint file with restore checkpoint id
SEG-7223 Update last_checkpoint file with restore checkpoint id

During the restore slave process, it should update the last_checkpoint
file with restore checkpoint in order to instruct backup daemon to continue
incremental backup rather than uploading first backup to master backup
directory in storage server

zbase/zbase-backup-tools,zbase/zbase-backup-tools,zbase/zbase-backup-tools,zbase/zbase-backup-tools,zbase/zbase-backup-tools,zbase/zbase-backup-tools