add a storage pool for storing libvirt images if Pool doesn't already exists

debian.yml

- name: add a storage pool for storing libvirt images if Pool doesn't already exists
  virt_pool:
    command: define
    # looks like setting name here is a redundant, the name is anyways taken from the template xml file, but should set it to make virt_pool module happy.
    name: "{{ image_pool_name }}"
    xml: '{{ lookup("template", "pool/dir.xml.j2") }}'
    uri: "{{ libvirt_uri }}"
  when: image_pool_name not in ansible_libvirt_pools