Modified ftp unittest to support python 3.4
Modified ftp unittest to support python 3.4

Juniper/py-junos-eznc,Juniper/py-junos-eznc,spidercensus/py-junos-eznc,pklimai/py-junos-eznc,spidercensus/py-junos-eznc,Juniper/py-junos-eznc,spidercensus/py-junos-eznc,pklimai/py-junos-eznc,pklimai/py-junos-eznc