DOCUMENTATION:
  name: subset
  author: Ansible Core
  version_added: "2.4"
  aliases: [issubset]
  short_description: is the list a subset of this other list
  description:
    - Validate if the first list is a sub set (is included) of the second list.
  options:
    _input:
      description: List.
      type: list
      elements: raw
      required: True
    _superset:
      description: List to test against.
      type: list
      elements: raw
      required: True
EXAMPLES: |
  big: [1,2,3,4,5]
  sml: [3,4]
  issmallinbig: '{{ small is subset(big) }}'
RETURN:
  _value:
    description: Returns V(True) if the specified list is a subset of the provided list, V(False) otherwise.
    type: boolean