Code review comment for lp:~linaro-infrastructure/cbuild/cbuild-scheduler_cbuild-lava

Another semantical (non-cleanup) thing: this waits for Stevan's feedback that build log layout structure as made by lava-panda-mock/lava-test-shell-template.yaml is ok to deal with in cronjob fetcher. If so, it should be propagated into lava-panda/*. In either case, those 2 should be consistent regarding log attaching steps.