stx manifest fails on heatclient

[Al Bailey]

Brief Description
-----------------
The stable/train branch for python-heatclient was deleted upstream
https://opendev.org/openstack/python-heatclient/branches

However the StarlingX manifest still points to it

Severity
--------
Major

Steps to Reproduce
------------------
repo sync

Expected Behavior
------------------
Should not report a failure about a missing branch

Actual Behavior
----------------
Reports an error

Reproducibility
---------------
100%

System Configuration
--------------------
N/A

Branch/Pull Time/Commit
-----------------------
May 5, 2023

Last Pass
---------
May 4, 2023

Timestamp/Logs
--------------
fatal: couldn't find remote ref refs/heads/stable/train

python-heatclient.git:
fatal: couldn't find remote ref refs/heads/stable/train
python-heatclient.git: sleeping 4.0 seconds before retrying
fatal: couldn't find remote ref refs/heads/stable/train

python-heatclient.git:
fatal: couldn't find remote ref refs/heads/stable/train
error: Cannot fetch python-heatclient.git from https://opendev.org/openstack/python-heatclient.git
Fetching: 100% (72/72), done in 34.976s

fatal: couldn't find remote ref refs/heads/stable/train

python-heatclient.git:
fatal: couldn't find remote ref refs/heads/stable/train
python-heatclient.git: sleeping 4.0 seconds before retrying
fatal: couldn't find remote ref refs/heads/stable/train

python-heatclient.git:
fatal: couldn't find remote ref refs/heads/stable/train
error: Cannot fetch python-heatclient.git from https://opendev.org/openstack/python-heatclient.git
Fetching: 100% (1/1), done in 4.809s

error: Unable to fully sync the tree.
error: Downloading network changes failed.
Try re-running with "-j1 --fail-fast" to exit at the first error.

Test Activity
-------------
Development

Workaround
----------
Update or remove that entry in the manifest

Note: I believe we can remove these client entries from the manifest.
They were used to build a client image and the code that builds those images could be revisited to not require checking out the branches in the manifest

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/manifest/+/882479

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/manifest/+/882479
Committed: https://opendev.org/starlingx/manifest/commit/acc2405bb0e603b77096690b857c5abdd09cff9b
Submitter: "Zuul (22348)"
Branch: master

commit acc2405bb0e603b77096690b857c5abdd09cff9b
Author: Davlet Panech <email address hidden>
Date: Fri May 5 15:14:21 2023 -0400

    Pin openstack train repos to specific revisions

    Opendev is in the process of deleting the train branches from their
    repos. Pin them to the last known revisions, as of 2023-05-04:

    http://mirror.starlingx.cengn.ca/mirror/starlingx/master/debian/monolithic/20230504T060000Z/outputs/CONTEXT.sh

    Partial-Bug: 2018623
    Change-Id: I35c50a0f5a493fe87ad82f1cddef53162b43db55
    Signed-off-by: Davlet Panech <email address hidden>

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: r/stx.8.0
Review: https://review.opendev.org/c/starlingx/manifest/+/883112

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: r/stx.7.0
Review: https://review.opendev.org/c/starlingx/manifest/+/883162

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: r/stx.6.0
Review: https://review.opendev.org/c/starlingx/manifest/+/883192

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/manifest/+/883112
Committed: https://opendev.org/starlingx/manifest/commit/03da59f6b77f81ca243040467f855461619b7fc4
Submitter: "Zuul (22348)"
Branch: r/stx.8.0

commit 03da59f6b77f81ca243040467f855461619b7fc4
Author: Davlet Panech <email address hidden>
Date: Fri May 5 15:14:21 2023 -0400

    Pin openstack train repos to specific revisions

    Opendev is in the process of deleting the train branches from their
    repos. Pin them to the last known revisions, as of 2023-05-04:

    http://mirror.starlingx.cengn.ca/mirror/starlingx/master/debian/monolithic/20230504T060000Z/outputs/CONTEXT.sh

    Partial-Bug: 2018623
    Change-Id: I35c50a0f5a493fe87ad82f1cddef53162b43db55
    Signed-off-by: Davlet Panech <email address hidden>
    (cherry picked from commit acc2405bb0e603b77096690b857c5abdd09cff9b)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/manifest/+/883162
Committed: https://opendev.org/starlingx/manifest/commit/d6b8efb537b3e6e2ee67bdf6d5dc7a68ee086d53
Submitter: "Zuul (22348)"
Branch: r/stx.7.0

commit d6b8efb537b3e6e2ee67bdf6d5dc7a68ee086d53
Author: Davlet Panech <email address hidden>
Date: Fri May 5 15:14:21 2023 -0400

    Pin openstack train repos to specific revisions

    Opendev is in the process of deleting the train branches from their
    repos. Pin them to the last known revisions, as of 2023-05-04:

    http://mirror.starlingx.cengn.ca/mirror/starlingx/master/debian/monolithic/20230504T060000Z/outputs/CONTEXT.sh

    Partial-Bug: 2018623
    Change-Id: I35c50a0f5a493fe87ad82f1cddef53162b43db55
    Signed-off-by: Davlet Panech <email address hidden>
    (cherry picked from commit acc2405bb0e603b77096690b857c5abdd09cff9b)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/manifest/+/883192
Committed: https://opendev.org/starlingx/manifest/commit/ebdda95a77d44d8b7eb89e57b966b81c0bd99822
Submitter: "Zuul (22348)"
Branch: r/stx.6.0

commit ebdda95a77d44d8b7eb89e57b966b81c0bd99822
Author: Davlet Panech <email address hidden>
Date: Fri May 5 15:14:21 2023 -0400

    Pin openstack train repos to specific revisions

    Opendev is in the process of deleting the train branches from their
    repos. Pin them to the last known revisions, as of 2023-05-04:

    http://mirror.starlingx.cengn.ca/mirror/starlingx/master/debian/monolithic/20230504T060000Z/outputs/CONTEXT.sh

    Partial-Bug: 2018623
    Change-Id: I35c50a0f5a493fe87ad82f1cddef53162b43db55
    Signed-off-by: Davlet Panech <email address hidden>
    (cherry picked from commit acc2405bb0e603b77096690b857c5abdd09cff9b)