[Bug 1932054] [NEW] molly-guard causes do-release-upgrade to fail

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On an Ubuntu 16.04 LTS to Ubuntu 18.04 LTS upgrade, even if you use apt-
get purge molly-guard before the upgrade and reboot without being
prompted for the system name, molly-guard somehow magically comes back
and, at the end of the upgrade, the following occurs:

System upgrade is complete.

Restart required

To finish the upgrade, a restart is required. 
If you select 'y' the system will be restarted. 

Continue [yN] y
W: molly-guard: SSH session detected!
Please type in hostname of the machine to reboot: 
Good thing I asked; I won't reboot cedar-falls-ivr-pri2 ...

At this point you terminate the screen session and reboot.  If you back
out of the upgrade the system is left in an inconsistent state: The
software is for Ubuntu 18.04 but /etc/apt/sources.list is for Ubuntu
16.04

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: molly-guard (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: do-release-upgrade molly-guard
-- 
molly-guard causes do-release-upgrade to fail
https://bugs.launchpad.net/bugs/1932054
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