title: read the var file and iterate through it
body: <p>I am new to ansible. I want to read a var file and then iterate through it. 
  My var file looks like:</p>
  
  <pre><code>Project_name1:
      -a
      -B
      -C
  Project_name2:
      -aa
      -bb
  Project_name3:
      -ab
  </code></pre>
  
  <p>Now, my playbook looks like</p>
  
  <pre><code>- name: include the cars and iterate through them
     include_vars:
       file:project.yml
       name:project
     loop:"{{project}}"
  </code></pre>
  
  <p>I am not sure how can i loop through the var file. I want the Ansible to read first var which is Project_name1 and then read all the list. Then read Project_name2 and read it's list and so on. </p>