Comment 19 for bug 1843104

Reviewed: https://review.opendev.org/684792
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=ec970fd6e85b19126409ef39aefa013bac701503
Submitter: Zuul
Branch: master

commit ec970fd6e85b19126409ef39aefa013bac701503
Author: Akihiro Motoki <email address hidden>
Date: Wed Sep 25 21:29:05 2019 +0900

    Handle partial dict setting

    In Train cycle, we moved the definition of default values
    to openstack_dashboard/defaults.py. The current code accesses
    a dict member using []. It requires operators to define a dict
    setting with a full member.

    This commit allows to use dict-type settings with partial members.

    A new function is introduced to retrieve a dict-type setting
    considering default values defined in
    {openstack_dashboard,horizon,openstack_auth}/defaults.py

    Change-Id: I7ff0ad4bca698aef9c0eba370b0570200a14367a
    Closes-Bug: #1843104