Description of problem:
Deployment with custom stack name fails during ssh admin enablement workflow with: get_blacklisted_ip_addresses task:


2018-09-28 19:56:10Z [qe-Cloud-0]: CREATE_COMPLETE  Stack CREATE completed successfully

 Stack qe-Cloud-0/918449b3-262b-4266-8433-977ebe2e191f CREATE_COMPLETE 

Deploying overcloud configuration
Enabling ssh admin (tripleo-admin) for hosts:
192.168.24.9 192.168.24.20 192.168.24.15 192.168.24.8 192.168.24.12 192.168.24.6 192.168.24.7 192.168.24.16
Using ssh user heat-admin for initial connection.
Using ssh key at /home/stack/.ssh/id_rsa for initial connection.
Generating public/private rsa key pair.
Your identification has been saved in /tmp/tmpHGR9Fx/id_rsa.
Your public key has been saved in /tmp/tmpHGR9Fx/id_rsa.pub.
The key fingerprint is:
SHA256:diGpa4o6dN8pl6ZP2qLQDAvOcPbSMC6hG1A9UldbqFA TripleO split stack short term key
The key's randomart image is:
+---[RSA 4096]----+
|    ..E....      |
|   o..  .+       |
|  o o. .+ .      |
| . . ... . .     |
|=.=   . S .      |
|B*=*   o .       |
|==+o+ +.o        |
|.+.o *+*         |
|oo..ooBo         |
+----[SHA256]-----+
Inserting TripleO short term key for 192.168.24.9
Warning: Permanently added '192.168.24.9' (ECDSA) to the list of known hosts.
Inserting TripleO short term key for 192.168.24.20
Warning: Permanently added '192.168.24.20' (ECDSA) to the list of known hosts.
Inserting TripleO short term key for 192.168.24.15
Warning: Permanently added '192.168.24.15' (ECDSA) to the list of known hosts.
Inserting TripleO short term key for 192.168.24.8
Warning: Permanently added '192.168.24.8' (ECDSA) to the list of known hosts.
Inserting TripleO short term key for 192.168.24.12
Warning: Permanently added '192.168.24.12' (ECDSA) to the list of known hosts.
Inserting TripleO short term key for 192.168.24.6
Warning: Permanently added '192.168.24.6' (ECDSA) to the list of known hosts.
Inserting TripleO short term key for 192.168.24.7
Warning: Permanently added '192.168.24.7' (ECDSA) to the list of known hosts.
Inserting TripleO short term key for 192.168.24.16
Warning: Permanently added '192.168.24.16' (ECDSA) to the list of known hosts.
Starting ssh admin enablement workflow
Removing short term keys locally
ssh admin enablement workflow - FAILED.
Failure caused by error in tasks: get_blacklisted_ip_addresses

  get_blacklisted_ip_addresses [task_ex_id=9f129a50-b6fd-4696-a35e-fda118a95e34] -> The action raised an exception [action_ex_id=ccf58805-442c-4e13-9cce-2560a8ff9636, action_cls='<class 'mistral.actions.action_factory.HeatAction'>', attri
butes='{u'client_method_name': u'stacks.output_show'}', params='{u'stack_id': u'overcloud', u'output_key': u'BlacklistedIpAddresses'}']
 HeatAction.stacks.output_show failed: ERROR: The Stack (overcloud) could not be found.
    [action_ex_id=ccf58805-442c-4e13-9cce-2560a8ff9636, idx=0]: The action raised an exception [action_ex_id=ccf58805-442c-4e13-9cce-2560a8ff9636, action_cls='<class 'mistral.actions.action_factory.HeatAction'>', attributes='{u'client_met
hod_name': u'stacks.output_show'}', params='{u'stack_id': u'overcloud', u'output_key': u'BlacklistedIpAddresses'}']
 HeatAction.stacks.output_show failed: ERROR: The Stack (overcloud) could not be found.


Version-Release number of selected component (if applicable):
openstack-tripleo-common-9.3.1-0.20180920204842.el7ost.noarch
openstack-tripleo-heat-templates-9.0.0-0.20180919080941.0rc1.0rc1.el7ost.noarch

How reproducible:
100%

Steps to Reproduce:
1. Deploy overcloud with custom stack name:

openstack overcloud deploy \
--timeout 100 \
--templates /usr/share/openstack-tripleo-heat-templates \
--stack qe-Cloud-0 \
--libvirt-type kvm \
--ntp-server clock.redhat.com \
-e /home/stack/virt/internal.yaml \
-e /usr/share/openstack-tripleo-heat-templates/environments/network-isolation.yaml \
-e /home/stack/virt/predictable_ips_rr.yml \
-e /home/stack/virt/network/predictable-ips.yaml \
-e /home/stack/virt/network/network-environment.yaml \
-e /home/stack/virt/enable-tls.yaml \
-e /home/stack/virt/inject-trust-anchor.yaml \
-e /home/stack/virt/public_vip.yaml \
-e /usr/share/openstack-tripleo-heat-templates/environments/ssl/tls-endpoints-public-ip.yaml \
-e /home/stack/virt/hostnames.yml \
-e /usr/share/openstack-tripleo-heat-templates/environments/ceph-ansible/ceph-ansible.yaml \
-e /home/stack/virt/debug.yaml \
-e /home/stack/virt/custom_hostnames.yaml \
-e /home/stack/virt/nodes_data.yaml \
-e /home/stack/virt/docker-images.yaml \


Actual results:
Fails with ERROR: The Stack (overcloud) could not be found.

Expected results:
No failure.

Additional info: