fix SSE_HOST var for zuul proxy on micado

micado/storage-platform_uow-openstack.yaml.tpl

@@ -492,7 +492,7 @@ topology_template:
          - name: KEYTRAY_HOST
            value: "{{ .Env.KEYTRAY_HOST }}"
          - name: SSE_HOST
-           value: "{{ .Env.SSE_HOST }}"
+           value: "{{ .Env.ZUUL_HOST }}"
          - name: XNAT_USER
            value: "{{ .Env.XNAT_ADMIN_USER }}"
          - name: XNAT_PASSWORD