We need to set the password for user root, otherwise the
sudo package refuses to get removed. See e.g.
See https://jenkins.mgm.sipwise.com/view/piuparts/job/metapackages-piuparts/290/consoleFull
| Removing sudo (1.8.10p3-1+deb8u3) ...
| You have asked that the sudo package be removed,
| but no root password has been set.
| Without sudo, you may not be able to gain administrative privileges.
|
| If you would prefer to access the root account with su(1)
| or by logging in directly,
| you must set a root password with "sudo passwd".
|
| If you have arranged other means to access the root account,
| and you are sure this is what you want,
| you may bypass this check by setting an environment variable
| (export SUDO_FORCE_REMOVE=yes).
|
| Refusing to remove sudo.
| dpkg: error processing package sudo (--purge):
| subprocess installed pre-removal script returned error exit status 1
Change-Id: Id49bfa2cdf1f4018d26c13d240682967a8507caa
Michael Prokop