Changed pysis SN to plio

import itertools

from math import floor

from pysis import isis

from plio.io.isis_serial_number import generate_serial_number

from ale.drivers import loads

from collections import OrderedDict

from knoten.csm import create_csm

        with open(isd, 'w+') as f:

            f.write(loads(line.strip(), formatter='usgscsm'))

        sn = isis.getsn(from_=line.strip()).strip().decode('utf-8')

        sn = generate_serial_number(line.strip())

        sensors[sn] = create_csm(isd)

    if clean: