Don't use file() to write object hashes
Don't use file() to write object hashes

Python3 does not have file().

TrivialFix

Change-Id: I878b58ad084d1611a9abb902f9d862c915c226e8

openstack/neutron,noironetworks/neutron,mahak/neutron,mahak/neutron,mahak/neutron,openstack/neutron,cloudbase/neutron,igor-toga/local-snat,eayunstack/neutron,openstack/neutron,cloudbase/neutron,huntxu/neutron,sebrandon1/neutron,huntxu/neutron,igor-toga/local-snat,noironetworks/neutron,eayunstack/neutron,sebrandon1/neutron