Explictly set kolla-toolbox upper constraints

Author: seunghun1ee

etc/kayobe/kolla.yml

@@ -324,6 +324,8 @@ kolla_build_blocks:
         fi
     {% endif %}
     {% endif %}
+  kolla_toolbox_header: |
+    ENV UPPER_CONSTRAINTS_FILE=https://raw.githubusercontent.com/stackhpc/requirements/stackhpc/{{ openstack_release }}/upper-constraints.txt
   bifrost_base_header: |
     ADD additions-archive /
   grafana_plugins_install: |