Fix dockerfile
Fix dockerfile

I think it was missing the most important part :) installing pyez
Juniper/py-junos-eznc,Juniper/py-junos-eznc,spidercensus/py-junos-eznc,spidercensus/py-junos-eznc,pklimai/py-junos-eznc,Juniper/py-junos-eznc,spidercensus/py-junos-eznc,pklimai/py-junos-eznc,pklimai/py-junos-eznc