Remove temporary local HasProject
Remove temporary local HasProject

Now that the tenant_id rename has merged in Neutron we can
remove the temporary work-around.

Also switch from the deprecated models_v2.HasId to the relocated
model_base.HasId

Related Blueprint: keystone-v3

Change-Id: I420826bd78fe4ef2b3be5b41215b45058943ea8a

openstack/neutron-fwaas,openstack/neutron-fwaas