Code review comment for lp:mir/0.25

Don't forget this one, eventually:
   https://code.launchpad.net/~vanvugt/mir/not-fixed-in-0.25/+merge/311455

Also if you need to rebuild zesty at all then you will hit build failures now (thanks to the new googletest package). That is fixed here:
   https://code.launchpad.net/~raof/mir/fix-googletest-zesty-build/+merge/311678