Enable no_log for setup-juju-client

Change-Id: Ia957c84e69645dfc5c892607fb9db78b1f5b554a
diff --git a/playbooks/setup-juju-client/pre.yaml b/playbooks/setup-juju-client/pre.yaml
index 2932385..fe59758 100644
--- a/playbooks/setup-juju-client/pre.yaml
+++ b/playbooks/setup-juju-client/pre.yaml
@@ -6,6 +6,7 @@
     become: true
 
   - name: Log In to the Controller
+    no_log: true
     block:
       - name: Log in
         ansible.builtin.shell: juju login 10.40.2.2:17070 --controller maas-controller --user zuul-nodepool-zaza