Code review comment for lp:~le-chi-thu/lava-dispatcher/update-snowball-license

We have support in the packages now for setting the debconf key, and should figure out how to do this properly. Ricardo said he thinks he knows where to start with that. Then this workaround will not be needed. This is ok for now, if we can deploy this right away - at least it will get snowball working again for the day. We should really fix this right asap though, or else we will always be having to keep up with this small fixes.