Predeployed nodes overcloud failure

Issue

Failure to deploy overcloud.

Config downloaded at /var/lib/mistral/stackname
The action raised an exception [action_ex_id=cd433232-635f-4950-83e5-038f755a260e, action_cls='<class 'mistral.actions.action_factory.AnsibleGenerateInventoryAction'>', attributes='{}', params='{u'ansible_ssh_user'
: u'tripleo-admin', u'plan_name': stackname', u'ssh_network': u'ctlplane', u'work_dir': u'/var/lib/mistral/stackname'}']
 list index out of range