Comment 57 for bug 1527727

I've removed the verification-failed-xenial tag.
The problem reported in bug 1750732 may be related to a grub upgrade, but
surely is not related to this specific grub upgrade.

Please see the changes
 http://launchpadlibrarian.net/354651271/grub2_2.02~beta2-36ubuntu3.16_2.02~beta2-36ubuntu3.17.diff.gz
for justification.

The only change made there is a 'setenv' call.