py34: Enable initial python34 testing for VPNaaS
py34: Enable initial python34 testing for VPNaaS

This adds the initial unit tests which pass for python34
so we can enable this in the gate job.

Change-Id: Ibde058c11804a783b4477ecf4d59c1af99bd73fc
Signed-off-by: Kyle Mestery <9cfbda34e625c7b0454bcb19a48d07c46f9097d2@mestery.com>

openstack/neutron-vpnaas,openstack/neutron-vpnaas