Update registry credentials during rehoming

As we are switching to use 'sysinv' user instead of 'admin' user to
access the registries, this commit adds a task in the rehoming
playbook to update the registry credentials with the sysinv
credentials from the new system controllers which a subcloud is
migrating to.

Test steps:
1. Deploy a AIOSX subcloud in central cloud A, update the subcloud's
registries with its sysinv credentials.
2. Update the admin credentials from central cloud B in the subcloud.
3. Migrate the subcloud to central cloud B.
4. Lock/unlock the subcloud after its deploy status turns to
"complete" state.

Test result:
The subcloud turns online after unlocking and turns to "in-sync" after
being managed by central cloud B. The registries auth-secrets are all
updated to sysinv credentials from central cloud B. The central
registry can be accessed from the subcloud with the sysinv user and
its password.

Depends-On: https://review.opendev.org/c/starlingx/utilities/+/814645
Closes-Bug: 1947014
Signed-off-by: Yuxing Jiang <yuxing.jiang@windriver.com>
Change-Id: I384930d3842f8a4da03648af7153dea430c49baa

playbookconfig/src/playbooks/roles/rehome-subcloud/update-keystone-data/tasks/main.yml

@@ -22,6 +22,13 @@
 - name: Restart keystone service
   command: "sm-restart service keystone"
 
+- name: Wait until keystone is restarted
+  command: "sm-query service keystone"
+  register: keystone_service_status
+  until: keystone_service_status.stdout == "keystone is enabled-active-"
+  retries: 10
+  delay: 10
+
 - name: Migrate keystone passwords
   import_tasks: migrate_keystone_passwords.yml
 

playbookconfig/src/playbooks/roles/rehome-subcloud/update-keystone-data/tasks/migrate_keystone_passwords.yml

@@ -5,10 +5,13 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 # SUB-TASKS DESCRIPTION:
-#   These tasks update keystone passwords in keystone database, secure hieradata,
-#   relevant service config files as well as service passwords in keyring.
+#   These tasks update docker registry credentials, keystone passwords in keystone
+#   database, secure hieradata, relevant service config files as well as service
+#   passwords in keyring.
 #
 
+- name: Update docker registry credentials
+  command: "update_docker_registry_auth.sh 'sysinv' '{{ users['sysinv'] }}'"
 
 - name: Get current time before update password
   # TODO(yuxing) The 'openstack user set' may fail to update password in