Make python34 job voting for Congress
Make python34 job voting for Congress

Master is now python3 compatible, so make the python3 job voting
and have it run for master and all future stable branches.
Stop running it on stable/kilo and stable/liberty since they
will fail anyway.

Change-Id: I37176ac4bc703069783ad35d2aa5a8b227d508d4

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