Set tox_constraints_file for npm jobs and integration tests

npm jobs and integration tests always try to use the constraints
from releases.openstack.org and do not pick up the change in the gate
even when Depends-On is specified.

For npm jobs, https://review.opendev.org/#/c/709414/ allows us to pass
tox_constraints_file when creating the envvar of the constraints file.
This commit consumes it.

Change-Id: I396073182ff1e63df12ebb79c3ddd646277ddadf

.zuul.yaml

@@ -51,6 +51,9 @@
     post-run: playbooks/horizon-devstack-integration/post.yaml
     roles:
       - zuul: openstack-infra/devstack
+    required-projects:
+      - openstack/horizon
+      - openstack/requirements
     irrelevant-files:
       - ^.*\.rst$
       - ^doc/.*$
@@ -69,6 +72,7 @@
       devstack_services:
         horizon: true
       tox_envlist: integration
+      tox_constraints_file: "{{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/requirements'].src_dir }}/upper-constraints.txt"
 
 - job:
     name: horizon-dsvm-tempest-plugin
@@ -132,9 +136,11 @@
       Run lint using Node 10 for horizon plugins.
     vars:
       node_version: 10
+      tox_constraints_file: "{{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/requirements'].src_dir }}/upper-constraints.txt"
     nodeset: ubuntu-bionic
     required-projects:
-      openstack/horizon
+      - openstack/horizon
+      - openstack/requirements
 
 - job:
     name: nodejs10-npm-run-test
@@ -143,9 +149,11 @@
       Run test using Node 10 for horizon plugins.
     vars:
       node_version: 10
+      tox_constraints_file: "{{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/requirements'].src_dir }}/upper-constraints.txt"
     nodeset: ubuntu-bionic
     required-projects:
-      openstack/horizon
+      - openstack/horizon
+      - openstack/requirements
 
 - project-template:
     name: horizon-nodejs10-jobs