Set neutron_admin_auth_url to v2/v3 depending upon keystone version
Set neutron_admin_auth_url to v2/v3 depending upon keystone version

Change-Id: Ibd6a4a754c2df196cff506b9961e12919d5dfeb8
Closes-Bug: 1649740
(cherry picked from commit 3b6e62c3f08f31fc72e04fe17341c489230b1557)

Juniper/contrail-provisioning,Juniper/contrail-provisioning