bugfixes:
  - redhat_subscription - made code compatible with Python3 (https://github.com/ansible/ansible/pull/58665)
minor_changes:
  - redhat_subscription - do not call ``subscribtion-manager`` command, when it is not necessary (https://github.com/ansible/ansible/pull/58665)
  - redhat_subscription - made code more testable (https://github.com/ansible/ansible/pull/58665)
