Comment 1 for bug 1877483

Reviewed: https://review.opendev.org/726260
Committed: https://git.openstack.org/cgit/starlingx/root/commit/?id=eb971b6f7c8321064b3ca334e21f0609ffb70efe
Submitter: Zuul
Branch: master

commit eb971b6f7c8321064b3ca334e21f0609ffb70efe
Author: Scott Little <email address hidden>
Date: Thu May 7 19:12:03 2020 -0400

    Fix potential infinite loop in build-iso

    Function generate_dep_list is creating a DEPLISTFILE
    with a lot of unwanted 'installing package xxx' messages
    when it should only contain a list of unresolved
    dependencies.

    On the next iteration we waste a lot of time trying to install
    nonexistant packages 'installing' and 'packages', and re-installing
    packages we already have.

    Instead of converging on an empty DEPLISTFILE, we converge
    on a DEPLISTFILE that just reiterates the same list of
    'installing package' if we are lucky, which we usually are,
    but not always.

    Closes-Bug: 1877483
    Change-Id: I971725558eb628c6d6b5d0b42d0bcab6b46e722b
    Signed-off-by: Scott Little <email address hidden>