Use cord_provisioned boolean in playbooks

Change-Id: Ibe045e880c2d343c793a311645cce162f8336551
diff --git a/cord-compute-playbook.yml b/cord-compute-playbook.yml
index b0f191e..0176226 100644
--- a/cord-compute-playbook.yml
+++ b/cord-compute-playbook.yml
@@ -12,7 +12,7 @@
   hosts: all
   become: yes
   roles:
-    - { role: dns-configure, when: on_cloudlab }
+    - { role: dns-configure, when: not cord_provisioned }
 
 - name: Prep systems
   hosts: compute