SM-Mitaka: add back customization for horizon

Closes-Bug: #1606803

now contrail-horizon customization module is available, so HORIZON_CONFIG
could be added back for that.

Change-Id: I10c2f3ab73b47f694e8d70d53b69ab5e68019a1b

contrail/environment/modules/contrail/templates/local_settings.py.erb

@@ -658,7 +658,4 @@ ALLOWED_HOSTS = '*'
 COMPRESS_OFFLINE = True
 LOGOUT_URL='/horizon/auth/logout/'
 
-##TODO: remove the check for kilo once we have package available
-<%- if @package_sku !~ /^*:13\.0.*$/ -%>
 HORIZON_CONFIG['customization_module'] = 'contrail_openstack_dashboard.overrides'
-<%- end -%>