Bodhi: use workingDir instead of the HOME env variable for celery

Signed-off-by: Clement Verna <cverna@tutanota.com>

roles/openshift-apps/bodhi/templates/deploymentconfig.yml

@@ -391,9 +391,7 @@ items:
         - name: bodhi-celery-beat
 {% if env == "staging" %}
           image: bodhi-base-prebuilt:staging
-          env:
-          - name: HOME
-            value: "/tmp"
+          workingDir: "/tmp"
           command: ["/usr/bin/celery"]
           args: ["beat", "-A", "bodhi.server.tasks.app", "-l", "info"]
 {% else %}