Comment 3 for bug 1953365

Reviewed: https://review.opendev.org/c/starlingx/utilities/+/820575
Committed: https://opendev.org/starlingx/utilities/commit/f0addaecbd23ef2e52b584be8a4db3073b26d2b3
Submitter: "Zuul (22348)"
Branch: master

commit f0addaecbd23ef2e52b584be8a4db3073b26d2b3
Author: Yuxing Jiang <email address hidden>
Date: Mon Dec 6 09:58:00 2021 -0600

    Skip the secret deletion if it doesn't exist

    If the registry secret exists in the service parameters but doesn't
    exist in the OpenStack secret list, the current update script will
    throw out an error. This commit skips the secret deletion operation if
    the secret doesn't exists, allows creating a new secret and updating
    it to the service parameters.

    Test:
    1. Bring up a DC(DX central cloud + SX subcloud) with this change.
    2. Delete the ghcr registry secret manually, update the secrets again
    with sysinv credentials in the subcloud.
    3. Delete the ghcr registry secret manually, migrate the subcloud to
    another central cloud.

    Closes-bug: 1953365
    Signed-off-by: Yuxing Jiang <email address hidden>
    Change-Id: Id6afea988fa8559d8a80eaa5ddeec0a35a386014