Description of problem:
Since the GUI has been removed we don't have a strong need for Mistral in the undercloud. To simplify tripleo we should then remove Mistral and replace the Mistral workflows with Python and/or Ansible playbooks.
This BZ encompasses a number of upstream bugs: https://bugs.launchpad.net/tripleo/+bugs?field.tag=mistral-removal
Relevant reviews are tagged:
All work is done and merged. Closing.