Comment 1 for bug 1496074

I think the most sensible approach here would be to add a LiveFSBuild.version column and allow that to be optionally set in LiveFS.requestBuild, overriding the default timestamp-based one (that version is informational from LP's point of view, so we don't have to enforce uniqueness or anything). The LiveFSBuild.version property is already passed to the build, so the rest will just work from there.