Fix heat engine hostname environment variable

Change-Id: I3279523019e6ecee0b5be50768091ffb1ae3af00

openstack_operator/templates/heat/daemonset.yml.j2

@@ -58,12 +58,12 @@ spec:
       - name: heat-{{ component }}
         image: vexxhost/heat-{{ component }}:latest
         imagePullPolicy: Always
-        {% if env is defined %}
         env:
         - name: OS_DEFAULT__HOST
           valueFrom:
             fieldRef:
               fieldPath: spec.nodeName
+        {% if env is defined %}
         {% for v in env %}
         - name: "{{ v.name }}"
           value: "{{ v.value }}"