Horizon configuration changes

You will need to make the following changes on all of your hosts that are running Horizon.

Fix Apache configuration

The openstack-dashboard package installs /etc/httpd/conf.d/openstack-dashboard.conf, but the Staypuft installer replaces this with /etc/httpd/conf.d/15-horizon_vhost.conf. After upgrading horizon, you will have three configuration files:

15-horizon_vhost.conf
openstack-dashboard.conf
openstack-dashboard.conf.rpmnew

You will need to make the following changes:

Remove openstack-dashboard.conf.rpmnew:
```
  rm openstack-dashboard.conf.rpmnew
```

Modify 15-horizon_vhost.conf by replacing:

  Alias /static "/usr/share/openstack-dashboard/static"

With:

  Alias /dashboard/static "/usr/share/openstack-dashboard/static"

Fix dashboard configuration

The openstack-dashboard package installs /etc/openstack-dashboard/local_settings. After an upgrade, you will find two configuration files:

/etc/openstack-dashboard/local_settings
/etc/openstack-dashboard/local_settings.rpmnew

You will need to make the following changes:

Backup your existing local_settings file:
```
  cp local_settings local_settings.old
```

Rename local_settings.rpmnew to local_settings:

  mv local_settings.rpmnew local_settings

Replace the following configuration options with the corresponding value from your local_settings.old file:
- ALLOWED_HOSTS
- SECRET_KEY
- CACHES
- OPENSTACK_KEYSTONE_URL

After making these changes, you will need to restart horizon on all of your controllers. You may simply run systemctl restart httpd on your controllers, even with an HA deployment.