If we found 'standby' key in the configuration, we need to bootstrap
            not a real master, but a 'standby leader', that will take base backup
            from a remote master and start follow it.

def bootstrap_standby_leader(self):
        """ If we found 'standby' key in the configuration, we need to bootstrap
            not a real master, but a 'standby leader', that will take base backup
            from a remote master and start follow it.
        """
        clone_source = self.get_remote_master()
        msg = 'clone from remote master {0}'.format(clone_source.conn_url)
        result = self.clone(clone_source, msg)
        self._post_bootstrap_task.complete(result)
        if result:
            self.state_handler.set_role('standby_leader')

        return result