networking-nec: Enable python3 and check-requirement jobs
networking-nec: Enable python3 and check-requirement jobs

Change-Id: I77af3c3fd6c848367d9111d5fb77353992ce2542

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