Refs #6180,BZ1100311 - Implement organization destroy in dynflow

- [ ] https://github.com/theforeman/foreman-tasks/pull/77
- [x] Get first ACK
- [ ] Get second ACK
- [ ] Have someone test

CLI https://github.com/Katello/hammer-cli-katello/pull/204
I assume because we didn't want an exception raised?