Install hook fails on xenial s390x - package criu not available

[Andrew McLeod]

charm cs:xenial/lxd fails to deploy during install hook, as package criu is not for s390x until artful:

E: Package 'criu' has no installation candidate

https://pastebin.canonical.com/209557/

Charm modification is therefore required if arch = s390x and release is less than artful

[James Page (james-page)]

OK so this needs an arch specific package selection in the base package set that gets installed - criu is in BASE_PACKAGES but is not available on all archs.

[Corey Bryant (corey.bryant)]

patch review: https://review.openstack.org/#/c/566338

[Corey Bryant (corey.bryant)]

Hi Andrew, can you test this to make sure it works? I don't have access to an s390x machine.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/566338
Committed: https://git.openstack.org/cgit/openstack/charm-lxd/commit/?id=d545eb292eee98abaeebb5d13aeb72d2635b1c0c
Submitter: Zuul
Branch: master

commit d545eb292eee98abaeebb5d13aeb72d2635b1c0c
Author: Corey Bryant <email address hidden>
Date: Fri May 4 14:57:54 2018 +0000

    Don't install criu for arm64/s390x prior to artful

    The criu package doesn't exist for arm64/s390x prior to artful,
    causing an install hook failure. Let's not attempt to install
    it when that is the case.

    Change-Id: If0cc517d9e607604e427aab385fabd8a9a193fdf
    Closes-Bug: #1748235