Comment 2 for bug 1964556

Reviewed: https://review.opendev.org/c/starlingx/distcloud/+/833219
Committed: https://opendev.org/starlingx/distcloud/commit/e101cc165150ab075ef945ae88dbc61fc7b0a8a7
Submitter: "Zuul (22348)"
Branch: master

commit e101cc165150ab075ef945ae88dbc61fc7b0a8a7
Author: Kyle MacLeod <email address hidden>
Date: Thu Mar 10 22:54:57 2022 -0500

    Fix logic to determine the existence of image list

    This commit addresses the issue for the prestage orchestration when no
    image list file has been uploaded.

    The fix is to properly check for the non-existing file.

    Test Plan:

    PASS:
    - Verify prestaging standalone with no image list uploaded
    - Verify prestaging orchestration with no image list uploaded
    - Verify prestaging with image list provided, default name
    - Verify prestaging case with image list provided, non-default name
    - Verify prestaging standalone with empty image list uploaded
      - ansible fails in this case, as expected

    Closes-Bug: 1964556

    Signed-off-by: Kyle MacLeod <email address hidden>
    Change-Id: I22c671968e32b10de83e0c352b64d4b6e2d02889