Comment 6 for bug 1642663

@Julie, note that we won't be able to use this until tripleo-common needs to do the instackenv file format conversion to ironic nodes format when registering nodes. Until then we have to hardcode list of supported drivers as tripleo-common needs to support conversion of those. By introduction of using ironic format in instackenv.json we'll be able to remove the conversion logic from tripleo-common (and TripleO UI) and allow user to set any ironic driver (and list drivers using ironic in TripleO UI, as well as list of driver specific properties)

See: https://etherpad.openstack.org/p/gui-ocata line 80

btw. no Mistral needed, we can call Ironic API directly...