Switch to horizon-nodejs4-jobs template
Switch to horizon-nodejs4-jobs template

We need to switch these jobs to xenial. But while we're doing that,
let's shift to consuming a template managed in the horizon repo.

Depends-On: https://review.openstack.org/643198
Change-Id: I814466da98062ceb2bb30cf264451168c9a30693

openstack/zaqar-ui,openstack/zaqar-ui,openstack/zaqar-ui,openstack/zaqar-ui