Description:

The provider network cleaning automated feature is not working in Ocata and writing this bug to ensure it gets resolved.  This works in newton. 
The specific information for this feature is found in the following document.
http://tripleo.org/advanced_deployment/baremetal_overcloud.html#configuring-cleaning
This same procedure worked flawlessly in newton so it appears new issue for Ocata.

Steps to duplicate upstream
1) deployed undercloud using quickstart release master-tripleo-ci
2) deploy overcloud with ironic-config.yaml first without the ironic::conductor::cleaning_network_uuid in the ControllerExtraConfig parameter successfully
3) Get hieradata variable to the UUID of the provider network
source overcloudrc
openstack network show external -f value -c id
4) Add ControllerExtraConfig parameter (see below)
5) run deploy overcloudrc command outlined in Step#2
6) check [cleaning_network_uuid] variable in /etc/ironic/ironic.conf and this still commented out and openstack-ironic-conductor svc is running. no sign of restart

oc deploy command:
openstack overcloud deploy --templates -e /usr/share/openstack-tripleo-heat-templates/environments/services/ironic.yaml -e /usr/share/openstack-tripleo-heat-templates/environments/puppet-pacemaker.yaml -e ironic-config.yaml

openstack-ironic-conductor service is running

ironic-config.yaml:
parameter_defaults:
  ComputeCount: 1
  ControllerCount: 3
  OvercloudControlFlavor: control
  OvercloudComputeFlavor: compute
  ControllerExtraConfig:
       ironic::drivers::ssh::libvirt_uri: "qemu:///session"
       ironic::conductor::cleaning_network_uuid: <some uuid>
  IronicCleaningDiskErase: metadata
  IronicEnabledDrivers:
    - pxe_ssh
  NovaSchedulerDefaultFilters:
    - RetryFilter
    - AggregateInstanceExtraSpecsFilter
    - AvailabilityZoneFilter
    - RamFilter
    - DiskFilter
    - ComputeFilter
    - ComputeCapabilitiesFilter
    - ImagePropertiesFilter
  NtpServer: ["xx.com","xx.com"]

Environment:
openstack-ironic-api-6.2.1-0.20170110232305.bbd0e96.el7.centos.noarch
openstack-ironic-conductor-6.2.1-0.20170110232305.bbd0e96.el7.centos.noarch
openstack-ironic-common-6.2.1-0.20170110232305.bbd0e96.el7.centos.noarch

Workaround:
As described in the document for this feature it can be done manually.