'Add legacy pools to allow extending a volume after upgrade.
:param pools: the pool list
:return: pools - the updated pool list'

@staticmethod
def add_legacy_pools(pools):

    extra_pools = []
    for pool in pools:
        if ('none' in pool['pool_name'].lower()):
            extra_pools.append(pool)
    for pool in extra_pools:
        slo = pool['pool_name'].split('+')[0]
        srp = pool['pool_name'].split('+')[2]
        array = pool['pool_name'].split('+')[3]
        new_pool_name = ('%(slo)s+%(srp)s+%(array)s' % {'slo': slo, 'srp': srp, 'array': array})
        new_pool = deepcopy(pool)
        new_pool['pool_name'] = new_pool_name
        pools.append(new_pool)
    return pools
