'Reverses a replication between two volumes.
:param fovolume: Failed over volume. (Current)
:param ovolume: Original source volume.
:param qosnode: QOS node name to use to create the replay.
:return: ScReplication object or None.'

def replicate_to_common(self, svolume, dvolume, qosnode):

    creplay = self.find_common_replay(svolume, dvolume)
    if creplay:
        payload = {}
        payload['Name'] = ('fback:' + dvolume['name'])
        payload['Notes'] = self.notes
        payload['VolumeFolder'] = self._get_id(dvolume['volumeFolder'])
        r = self.client.post(('StorageCenter/ScReplay/%s/CreateView' % self._get_id(creplay)), payload, True)
        if self._check_result(r):
            vvolume = self._get_json(r)
            if vvolume:
                if self.create_replay(svolume, 'failback', 600):
                    return self.start_replication(svolume, vvolume, 'Asynchronous', qosnode, False)
    return None
