title: ansible ... molecule.yml - how to refer to env variables define in same file?
body: <p>I cam trying to restructure a molecule file to use a common playbook to reduce code duplication.</p>
  
  <p>I can get it to work with a relative path but using referring to the other playbook relative to env var like <code>ANSIBLE_ROLES_PATH</code> would be more intuitive. </p>
  
  <p>The commented out versions below don't work but the third variant is fine.</p>
  
  <p>Is there a way to do this?</p>
  
  <pre><code>more molecule.yml
   // SNIP 
  provisioner:
    name: ansible
    config_options:
      defaults:
        callback_whitelist: "profile_tasks, timer"
    env:
      ANSIBLE_ROLES_PATH: ../../../../../../roles
    playbooks:
  #    destroy: "{{ lookup('env', 'ANSIBLE_ROLES_PATH') }}/molecule/destroy.yml"
  #    destroy: "{{ANSIBLE_ROLES_PATH}}/molecule/destroy.yml"
      destroy: "../../../../../../roles/molecule/destroy.yml"
  scenario:
    name: default
  verifier:
    name: testinfra
    lint:
      name: flake8
  </code></pre>