paunch: cont_exec_args doesn't support unique names

[Emilien Macchi]

cont_exec_args method doesn't support unique name, it wasn't done in https://review.opendev.org/#/c/676156/.

So every time the method is called during a stack update with existing containers, it's trying to run "podman exec" into a container which doesn't exist anymore.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/677852

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.opendev.org/679040

[OpenStack Infra (hudson-openstack)]

Change abandoned by Bogdan Dobrelya (bogdando) (<email address hidden>) on branch: master
Review: https://review.opendev.org/679040

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/677852
Committed: https://git.openstack.org/cgit/openstack/paunch/commit/?id=2609ef687019c263cdcd5ab069044d2a3857a949
Submitter: Zuul
Branch: master

commit 2609ef687019c263cdcd5ab069044d2a3857a949
Author: Emilien Macchi <email address hidden>
Date: Wed Aug 21 19:31:11 2019 -0400

    Add unique names support for cont_exec_args method

    In I5617e11f5d315f408d818e1ce47aa68f4a0d777a we switched
    container_run_args to run the container cli run into a unique container
    name, but we forgot to do it for the container cli execs.

    So this patch will run the exec using the delegated container_name if we
    can otherwise fall back on the fixed container name.

    Co-Authored-By: Bogdan Dobrelya <email address hidden>
    Change-Id: I2654148d566f62b3e3620baf84f504113cb7312d
    Closes-Bug: #1840992

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/paunch 5.3.0 release.