Comment 17 for bug 1781176

Verified with 1.1ubuntu1.18.04.7~16.04.2 on Xenial:

...
2019-04-05 16:17:32,704 INFO Initial blacklisted packages: ebtables
2019-04-05 16:17:32,705 INFO Initial whitelisted packages:
2019-04-05 16:17:32,705 INFO Starting unattended upgrades script
2019-04-05 16:17:32,705 INFO Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial
...
2019-04-05 16:17:33,813 DEBUG Checking: busybox-static ([<Origin component:'main' archive:'xenial-updates' origin:'Ubuntu' label:'Ubuntu' site:'archive.ubuntu.com' isTrusted:True>, <Origin component:'main' archive:'xenial-security' origin:'Ubuntu' label:'Ubuntu' site:'security.ubuntu.com' isTrusted:True>])
2019-04-05 16:17:33,960 DEBUG Checking: ebtables ([<Origin component:'main' archive:'xenial-updates' origin:'Ubuntu' label:'Ubuntu' site:'archive.ubuntu.com' isTrusted:True>])
2019-04-05 16:17:33,962 DEBUG adjusting candidate version: ebtables=2.0.10.4-3.4ubuntu1
2019-04-05 16:17:34,660 DEBUG pkgs that look like they should be upgraded: busybox-static
2019-04-05 16:17:34,712 DEBUG fetch.run() result: 0
...
2019-04-05 16:17:37,879 INFO All upgrades installed

From <email address hidden> Fri Apr 05 16:17:38 2019
Return-path: <email address hidden>
Envelope-to: <email address hidden>
Delivery-date: Fri, 05 Apr 2019 16:17:38 +0000
Received: from root by x-uu-verify.lxd with local (Exim 4.86_2)
 (envelope-from <email address hidden>)
 id 1hCRX8-0004lu-Pd
 for <email address hidden>; Fri, 05 Apr 2019 16:17:38 +0000
Subject: [reboot required] unattended-upgrades result for x-uu-verify: True
To: <email address hidden>
Auto-Submitted: auto-generated
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
From: root <email address hidden>
Message-Id: <email address hidden>
Date: Fri, 05 Apr 2019 16:17:38 +0000

Unattended upgrade returned: True

Warning: A reboot is required to complete this upgrade.

Packages that were upgraded:
 busybox-static=20

Package installation log:
Log started: 2019-04-05 16:17:35
Preparing to unpack .../busybox-static_1%3a1.22.0-15ubuntu1.4_amd64.deb ...
Unpacking busybox-static (1:1.22.0-15ubuntu1.4) over (1:1.22.0-15ubuntu1) .=
..
Processing triggers for man-db (2.7.5-1) ...
Setting up busybox-static (1:1.22.0-15ubuntu1.4) ...
Log ended: 2019-04-05 16:17:37

Unattended-upgrades log:
...