Debian iso fails in ansible bootstrap when using an authenticated registry

[Jerry Sun]

Brief Description
-----------------
Debian iso fails in ansible bootstrap when using an authenticated registry.
The same issue is not seen with the CentOS iso.

Two failures are seen:
- Error in retrieving credentials
- Error pulling images

Severity
--------
Medium - very specific config which is not widely used

Steps to Reproduce
------------------
install Debian with authenticated registry

Expected Behavior
------------------
ansible config success

Actual Behavior
----------------
ansible config failed

Reproducibility
---------------
Reproducible

System Configuration
--------------------
One node system
IPv4

Branch/Pull Time/Commit
-----------------------
2022-06-30

Last Pass
---------

Timestamp/Logs
--------------

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/ansible-playbooks/+/848315

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/ansible-playbooks/+/848315
Committed: https://opendev.org/starlingx/ansible-playbooks/commit/4ec4a8379f2847b2c39647d035ee601cec67e46d
Submitter: "Zuul (22348)"
Branch: master

commit 4ec4a8379f2847b2c39647d035ee601cec67e46d
Author: Jerry Sun <email address hidden>
Date: Thu Jun 30 12:33:09 2022 -0400

    Fix registry credentials retrieval for Debian

    Code that retrieves the registry credentials does not work properly
    with Python3. This commit fixes that.

    Test Plan:
      - Verify successful bootstrap for both CentOS and Debian
        using authenticated registry

    Change-Id: I7a9295782a52424d3d3e386fb4ca092516e0c2b2
    Closes-bug: 1980391
    Signed-off-by: Jerry Sun <email address hidden>

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/config/+/848328

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/config/+/848328
Committed: https://opendev.org/starlingx/config/commit/1cf6f891bc4dacdc81249e9c97e2eb75eb191442
Submitter: "Zuul (22348)"
Branch: master

commit 1cf6f891bc4dacdc81249e9c97e2eb75eb191442
Author: Jerry Sun <email address hidden>
Date: Thu Jun 30 14:31:15 2022 -0400

    Fix registry credentials retrieval for Debian

    Code that retrieves the registry credentials does not work properly
    with Python3. This commit fixes that.

    Test Plan:
      - Verify successful bootstrap for both CentOS and Debian
        using authenticated registry
    Partial-bug: 1980391

    Change-Id: I71cac14d8bdd63501fc804086cb8af429135bd92
    Signed-off-by: Jerry Sun <email address hidden>