Overcloud minor update doesn't work according to docs if overcloud stack has different name.

Issue

 [stack@e-director ~]$ openstack overcloud update run --nodes Controller
Started Mistral Workflow tripleo.package_update.v1.update_nodes. Execution ID: 
Waiting for messages on queue 'update' with no timeout.
[u'Using /tmp/ansible-mistral-actionwxc5vL/ansible.cfg as config file',
 u' [WARNING]: Could not match supplied host pattern, ignoring: Controller',
 u'ERROR! Specified hosts and/or --limit does not match any hosts']
Update failed with: {u'status': u'FAILED', u'execution': {u'name': u'tripleo.package_update.v1.update_nodes', u'created_at': u'2019-03-04 16:14:34', u'updated_at': u'2019-03-04 16:14:34', u'spec': {u'tasks': {u'node_update': {u'name': u'node_update', u'on-error': u'node_update_failed', u'on-success': [{u'node_update_passed': u'<% task().result.returncode = 0 %>'}, {u'node_update_failed': u'<% task().result.returncode != 0 %>'}], u'publish': {u'output': u'<% task().result %>'}, u'version': u'2.0', u'action': u'tripleo.ansible-playbook', u'input': {u'remote_user': u'<% $.node_user %>', u'become_user': u'root', u'ssh_private_key': u'<% $.private_key %>', u'verbosity': u'<% $.verbosity %>', u'queue_name': u'<% $.ansible_queue_name %>', u'extra_env_variables': u'<% $.ansible_extra_env_variables %>', u'skip_tags': u'<% $.skip_tags %>', u'inventory': u'<% $.inventory_file %>', u'execution_id': u'<% execution().id %>', u'module_path': u'<% $.module_path %>', u'become': True, u'trash_output': True, u'limit_hosts': u'<% $.nodes %>', u'playbook': u'<% $.work_dir %>/<% execution().id %>/<% $.playbook %>'}, u'type': u'direct'}, u'get_private_key': {u'name': u'get_private_key', u'on-success': u'node_update', u'publish': {u'private_key': u'<% task().result %>'}, u'version': u'2.0', u'action': u'tripleo.validations.get_privkey', u'type': u'direct'}, u'node_update_failed': {u'version': u'2.0', u'type': u'direct', u'name': u'node_update_failed', u'publish': {u'status': u'FAILED', u'message': u'Failed to update nodes - <% $.nodes %>, please see the logs.'}, u'on-success': u'notify_zaqar'}, u'node_update_passed': {u'version': u'2.0', u'type': u'direct', u'name': u'node_update_passed', u'publish': {u'status': u'SUCCESS', u'message': u'Updated nodes - <% $.nodes %>'}, u'on-success': u'notify_zaqar'}, u'notify_zaqar': {u'retry': u'count=5 delay=1', u'name': u'notify_zaqar', u'on-success': [{u'fail': u'<% $.get(\'status\') = "FAILED" %>'}], u'version': u'2.0', u'action': u'zaqar.queue_post', u'input': {u'queue_name': u'<% $.ansible_queue_name %>', u'messages': {u'body': {u'type': u'tripleo.package_update.v1.update_nodes', u'payload': {u'status': u'<% $.status %>', u'execution': u'<% execution() %>'}}}}, u'type': u'direct'}, u'download_config': {u'name': u'download_config', u'on-error': u'node_update_failed', u'on-success': u'get_private_key', u'version': u'2.0', u'action': u'tripleo.config.download_config', u'input': {u'work_dir': u'<% $.work_dir %>/<% execution().id %>'}, u'type': u'direct'}}, u'name': u'update_nodes', u'tags': [u'tripleo-common-managed'], u'version': u'2.0', u'input': [{u'node_user': u'heat-admin'}, u'nodes', u'playbook', u'inventory_file', {u'ansible_queue_name': u'tripleo'}, {u'module_path': u'/usr/share/ansible-modules'}, {u'ansible_extra_env_variables': {u'ANSIBLE_HOST_KEY_CHECKING': u'False', u'ANSIBLE_LOG_PATH': u'/var/log/mistral/package_update.log'}}, {u'verbosity': 1}, {u'work_dir': u'/var/lib/mistral'}, {u'skip_tags': u''}], u'description': u'Take a container and perform an update nodes by nodes'}, u'params': {u'namespace': u'', u'env': {}}, u'input': {u'inventory_file': u'Undercloud:\n  hosts:\n    undercloud: {}\n  vars:\n    ansible_connection: local\n    ansible_host: localhost\n    ansible_remote_tmp: /tmp/ansible-${USER}\n    auth_url: http://:5000/\n    cacert: null\n    os_auth_token: -----isH1LS0\n    plan: overcloud\n    project_name: admin\n    undercloud_service_list: [openstack-nova-compute, openstack-heat-engine, openstack-ironic-conductor,\n      openstack-swift-container, openstack-swift-object, openstack-mistral-engine]\n    undercloud_swift_url: http://:8080/v1/\n    username: admin\n', u'work_dir': u'/var/lib/mistral', u'verbosity': 1, u'skip_tags': u'', u'playbook': u'update_steps_playbook.yaml', u'ansible_extra_env_variables': {u'ANSIBLE_HOST_KEY_CHECKING': u'False', u'ANSIBLE_LOG_PATH': u'/var/log/mistral/package_update.log'}, u'module_path': u'/usr/share/ansible-modules', u'nodes': u'Controller', u'node_user': u'heat-admin', u'ansible_queue_name': u'update'}, u'id': u'a075f17d---b55b-'}}
(undercloud) [stack@e-director ~]$