Add debug for lab_domain

Signed-off-by: Dan Mick <dmick@redhat.com>

Author: ceph-jenkins

roles/testnode/tasks/resolvconf.yml

@@ -49,6 +49,10 @@
         (ansible_distribution|lower == 'ubuntu' and
         ansible_distribution_major_version|int == 16)
 
+- name: show lab_domain
+  debug: 
+    msg: lab_domain is {{ lab_domain }}
+
 - name: Ensure lab_domain is in search domains in /etc/resolv.conf
   lineinfile:
     dest: /etc/resolv.conf