Convert test client to use LXD (LXC and LXD conflict)

Change-Id: I891915ed742f7787ecef500607e18d2087dad915
diff --git a/cord-post-deploy-playbook.yml b/cord-post-deploy-playbook.yml
index 4341ae3..a562c5b 100644
--- a/cord-post-deploy-playbook.yml
+++ b/cord-post-deploy-playbook.yml
@@ -11,10 +11,15 @@
         - vars/cord.yml
         - vars/example_keystone.yml
 
+- name: Create test client
+  hosts: head
+  become: yes
+  roles:
+    - maas-test-client-install
+
 - name: Run post-deploy tests
   hosts: head
   become: no
   roles:
-    - maas-test-client-install
     - test-vsg
     - test-exampleservice