Comment 7 for bug 1831811

Reviewed: https://review.opendev.org/667560
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=4ecfdb6fd0e89f3b0ff6ca345d18c0db66e2eaeb
Submitter: Zuul
Branch: stable/queens

commit 4ecfdb6fd0e89f3b0ff6ca345d18c0db66e2eaeb
Author: Harald Jensås <email address hidden>
Date: Thu Jun 6 03:06:17 2019 +0200

    Turn CIDR in query filter into proper subnet

    Use netaddr.IPNetwork to convert CIDRs in a query
    into proper subnets.

    When creating subnets the CIDR is converted into
    a proper subnet. i.e a subnet can be created with
    cidr=10.0.0.11/24 in the create request. On create
    the cidr is turned into a proper subnet resulting
    in a subnet with cidr=10.0.0.0/24.

    This change does the same to CIDRs when used as
    query filters during a list subnet request, so
    that the same value that was used to create the
    subnet can be used to find the subnet.

    Conflicts:
        neutron/db/db_base_plugin_common.py

    Closes-Bug: #1831811
    Change-Id: I8ae478a03ceedc6c3b1ae1d40081b5e5158813e6
    (cherry picked from commit af773557323580c7b07bd41dd1f524e81530c939)