Add horizon to required-projects
The change adds openstack/horizon to required-projects for
zun-ui jobs.
name: openstack/zun-ui
templates:
- system-required
- - openstack-python-jobs
- - openstack-python35-jobs
+ - openstack-python-jobs-horizon
+ - openstack-python35-jobs-horizon
- check-requirements
- publish-openstack-sphinx-docs
- release-notes-jobs
