Add a non-voting py34 check job to Horizon
Add a non-voting py34 check job to Horizon

I'm porting the Horizon project to Python 3, we are very close to have a
working "tox -e py34" (it pass with
I69aeaf172d1d405dfeb4d2314f7bf0c571760201).

Change-Id: I73dac796b7c8523d6df5966b202a5041f86e2eba

Tesora/tesora-project-config,dongwenjuan/project-config,openstack-infra/project-config,noorul/os-project-config,Tesora/tesora-project-config,noorul/os-project-config,openstack-infra/project-config,dongwenjuan/project-config