Description of problem:
When attempting to deploy an SR-IOV capable deployment, deployment fails due to failing to execute derive PCI passthrough script.
The following error is raised:
2020-07-19 09:39:51Z [overcloud.AllNodesDeploySteps.ComputeOvsDpdkSriovHostPrepDeployment]: CREATE_FAILED  Resource CREATE failed: Error: resources[1]: Deployment to server failed: deploy_status_code : Deployment exited with non-zero status code: 2

 Stack overcloud CREATE_FAILED 

overcloud.AllNodesDeploySteps.ComputeOvsDpdkSriovHostPrepDeployment.1:
  resource_type: OS::Heat::SoftwareDeployment
  physical_resource_id: 95f17aa0-8925-471e-8a26-f6297de63ba1
  status: CREATE_FAILED
  status_reason: |
    Error: resources[1]: Deployment to server failed: deploy_status_code : Deployment exited with non-zero status code: 2
  deploy_stdout: |
    ...
    changed: [localhost]
    
    TASK [derive pci passthrough whitelist] ****************************************
    An exception occurred during task execution. To see the full traceback, use -vvv. The error was: If you are using a module and expect the file to exist on the remote, see the remote_src option
    fatal: [localhost]: FAILED! => {"changed": false, "msg": "Could not find or access '/usr/share/openstack-tripleo-heat-templates/docker/services/derive_pci_passthrough_whitelist.py' on the Ansible Controller.\nIf you are using a module and expect the file to exist on the remote, see the remote_src option"}
        to retry, use: --limit @/var/lib/heat-config/heat-config-ansible/69b653b5-367c-4091-9316-9b359b32782f_playbook.retry
    
    PLAY RECAP *********************************************************************
    localhost                  : ok=16   changed=12   unreachable=0    failed=1   
    
    (truncated, view all with --long)
  deploy_stderr: |

overcloud.AllNodesDeploySteps.ComputeOvsDpdkSriovHostPrepDeployment.0:
  resource_type: OS::Heat::SoftwareDeployment
  physical_resource_id: d9edc036-cfd5-44f4-925c-c6b2effe9025
  status: CREATE_FAILED
  status_reason: |
    Error: resources[0]: Deployment to server failed: deploy_status_code : Deployment exited with non-zero status code: 2
  deploy_stdout: |
    ...
    changed: [localhost]
    
    TASK [derive pci passthrough whitelist] ****************************************
    An exception occurred during task execution. To see the full traceback, use -vvv. The error was: If you are using a module and expect the file to exist on the remote, see the remote_src option
    fatal: [localhost]: FAILED! => {"changed": false, "msg": "Could not find or access '/usr/share/openstack-tripleo-heat-templates/docker/services/derive_pci_passthrough_whitelist.py' on the Ansible Controller.\nIf you are using a module and expect thHeat Stack create failed.
Heat Stack create failed.
e file to exist on the remote, see the remote_src option"}
        to retry, use: --limit @/var/lib/heat-config/heat-config-ansible/c3e9bed2-2ddb-4b35-8645-1a1353d6e685_playbook.retry
    
    PLAY RECAP *********************************************************************
    localhost                  : ok=16   changed=12   unreachable=0    failed=1


Version-Release number of selected component (if applicable):
Puddle: 2020-07-14.1
openstack-tripleo-common-containers-8.7.1-20.el7ost.noarch
ansible-tripleo-ipsec-8.1.1-0.20190513184007.7eb892c.el7ost.noarch
openstack-tripleo-heat-templates-8.4.1-62.el7ost.noarch
openstack-tripleo-common-8.7.1-20.el7ost.noarch
openstack-tripleo-ui-8.3.2-3.el7ost.noarch
openstack-tripleo-puppet-elements-8.1.1-2.el7ost.noarch
python-tripleoclient-9.3.1-7.el7ost.noarch
openstack-tripleo-validations-8.5.0-4.el7ost.noarch
puppet-tripleo-8.5.1-14.el7ost.noarch
openstack-tripleo-image-elements-8.0.3-1.el7ost.noarch

How reproducible:
Always

Steps to Reproduce:
1. Deploy SR-IOV capable deployment

Actual results:
Deployment fails.

Expected results:
Deployment succeeds.

Additional info: