Comment 4 for bug 1934115

Reviewed: https://review.opendev.org/c/openstack/neutron/+/803439
Committed: https://opendev.org/openstack/neutron/commit/4b8ebdef8d545dd5df7e5765eccc82b9136c92b0
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit 4b8ebdef8d545dd5df7e5765eccc82b9136c92b0
Author: Slawek Kaplonski <email address hidden>
Date: Wed Jun 30 11:28:36 2021 +0200

    Use elevated context to get default SG from database

    With new system/project scopes it may happen that project admin
    will try to list security groups for different project and during
    that call Neutron will ensure that default security group is created.

    In such case elevated context needs to be used to get SG object from
    the database otherwise, SG will not be found and error 500 will be
    returned through the API.

    Use of elevated context is fine here as if user don't have access to
    the SG, it will be filtered out by policy mechanism and it will not
    be returned through API.

    Closes-Bug: #1934115
    Change-Id: I0ca07d1a1aaf05c1992aea9e29575580d7933324
    (cherry picked from commit f6c3747caeac08df9d865312686be8eccb7f0472)