Switch to horizon-nodejs4-jobs-nonvoting 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: I9c83b8a07f4b69c72dad619ac0130222c5e14e98

.zuul.yaml

@@ -23,6 +23,7 @@
 
 - project:
     templates:
+      - horizon-nodejs4-jobs-nonvoting
       - openstack-python-jobs-horizon
       - openstack-python35-jobs-horizon
       - publish-openstack-docs-pti
@@ -30,14 +31,6 @@
       - release-notes-jobs-python3
     check:
       jobs:
-        - nodejs-npm-run-lint:
-            vars:
-              node_version: 4
-            voting: false
-        - nodejs-npm-run-test:
-            vars:
-              node_version: 4
-            voting: false
         - vitrage-dashboard-integration-tests:
             voting: false