title: ansible: The task includes an option with an undefined variable. The error was: 'variable' is undefined
body: <p>I am writing ansible playbook, and set the below variable :</p>
  
  <pre><code>default_tz: 'ZONE="America/Los_Angeles"'
  </code></pre>
  
  <p>I am trying to add the above variable to a file, by using the below code
  On the same playbook:</p>
  
  <pre><code>- name: configure time zone
    lineinfile:
     line: "{{ default_tz }}"
     dest: "/etc/sysconfig/clock"
  </code></pre>
  
  <p>I am getting the below error while running the playbook:</p>
  
  <pre><code>"The task includes an option with an undefined variable. The error was: 'default_tz' is undefined\
  </code></pre>