Comment 11 for bug 1915512

Reviewed: https://review.opendev.org/c/openstack/charm-octavia/+/787700
Committed: https://opendev.org/openstack/charm-octavia/commit/cc292d72e2cb47366e093490c5319503f86d93ec
Submitter: "Zuul (22348)"
Branch: master

commit cc292d72e2cb47366e093490c5319503f86d93ec
Author: Zhang Hua <email address hidden>
Date: Sat May 1 08:32:21 2021 +0800

    Delete hm port on unit removal

    JUJU_DEPARTING_UNIT will be set in leader unit as well when removing one
    unit, so update_controller_ip_port_list can use it to delete hm port and
    update neutron ip list. Besides, cluster.{connected,available} will be
    set by interface-openstack-ha when relation-{broken,departed} is changed,
    so update_controller_ip_port_list will also have a change to run.
    In other words, as long as update_controller_ip_port_list is triggered
    for various reasons, the cleanup will be completed.

    and pin cffi to 1.14.6 and pyparsing<3.0.0 for python < 3.6

    Closes-Bug: 1915512
    Func-Test-Pr: https://github.com/openstack-charmers/zaza-openstack-tests/pull/600
    Change-Id: I88c61b8d2d0b573df7df071ed7978e83b6803c5c