[sqlalchemy-20] Missing DB context in "_get_dvr_hosts_for_subnets"

[Rodolfo Alonso]

Related bug: https://bugs.launchpad.net/neutron/+bug/1964575

Log: https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_d00/841389/3/check/osc-functional-devstack-tips/d0091ef/controller/logs/screen-q-svc.txt

Snippet: https://paste.opendev.org/show/bmy2GK1Z7a7xBFBT75pb/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/842468

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/842468
Committed: https://opendev.org/openstack/neutron/commit/59973d29c3d9d2defd2003206e138a94090ad4ff
Submitter: "Zuul (22348)"
Branch: master

commit 59973d29c3d9d2defd2003206e138a94090ad4ff
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Fri May 13 14:05:57 2022 +0000

    [sqlalchemy-20] Add missing DB contexts in L3 methods

    The goal of this series of patches is to make the Neutron code
    compliant with SQLAlchemy 2.0.

    This patch adds the missing database contexts in the execution of
    some queries in the L3 code, reported in the following bugs. This
    patch also refactors the ``neutron.db.l3_db`` methods, using the
    method decorators instead of the inline context builders.

    Closes-Bug: #1974144
    Closes-Bug: #1974142
    Related-Bug: #1964575
    Change-Id: I7e18db7f1fa6b8878c13df09895c993704401815

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 21.0.0.0rc1 release candidate.