demote vlan to universe in 20.04

[Christian Ehrhardt ]

As it came up int he discussion at:
https://lists.ubuntu.com/archives/ubuntu-server/2019-December/008039.html

vlan was only used in the context of ifupdown which is demoted to universe.
Therefore vlan won't be needed in main.

It will be unseeded soon via:
https://code.launchpad.net/~paelzer/ubuntu-seeds/+git/ubuntu/+merge/376746

In addition there is only one dependency left
$ reverse-depends -r focal vlan
Reverse-Depends
===============
* nova-compute-libvirt
* nova-network <-- already got dropped in nova-21.0.0~b1~git2019120415.45fb747c98

Therefore @nova maintainers - please drop the dependency to the "vlan" package which is explicitly listed in d/control at the moment. The code seems to already use `ip link` so it might be just dropping the dependency, but I leave that to the openstack Team.

[Christian Ehrhardt  (paelzer)]

Added a task for Nova and UCA (not sure what you monitor - but also this might be a diff when you backport to Bionic so a UCA task might be right anyway).
Prio High to ensure it is removed in 20.04

[Christian Ehrhardt  (paelzer)]

FYI: seed change done, only the dependency from nova is remaining.

[Christian Ehrhardt  (paelzer)]

@Openstack Team - could you drop the dependency in time for 20.04 FF so that vlan can be demoted.

[James Page (james-page)]

Sahid has done the work for this drop - I've merged and pushed back to the nova packaging repo - will be uploaded with the next milestone snapshot.

[Launchpad Janitor (janitor)]

This bug was fixed in the package nova - 2:21.0.0~b2~git2020021008.1fcd74730d-0ubuntu2

---------------
nova (2:21.0.0~b2~git2020021008.1fcd74730d-0ubuntu2) focal; urgency=medium

  * d/p/monkey-patch-original-current-thread-active.patch: Cherry-picked from
    https://review.opendev.org/#/c/707474/. This fixes nova service failures
    that autopkgtests are hitting with Python 3.8 (LP: #1863021).

 -- Corey Bryant <email address hidden> Thu, 20 Feb 2020 09:35:53 -0500

[Christian Ehrhardt  (paelzer)]

vlan now shows as demotion to universe, I pinged the archive admins to do the move.

[Andy Whitcroft (apw)]

Override component to universe
qemu-system-x86-microvm 1:4.2-3ubuntu1 in focal amd64: main/otherosfs/optional/100% -> universe
vlan 2.0.4ubuntu1 in focal amd64: main/misc/extra/100% -> universe
vlan 2.0.4ubuntu1 in focal arm64: main/misc/extra/100% -> universe
vlan 2.0.4ubuntu1 in focal armhf: main/misc/extra/100% -> universe
vlan 2.0.4ubuntu1 in focal i386: main/misc/extra/100% -> universe
vlan 2.0.4ubuntu1 in focal ppc64el: main/misc/extra/100% -> universe
vlan 2.0.4ubuntu1 in focal s390x: main/misc/extra/100% -> universe
7 publications overridden.