After set of patches which add --work-dir option we have an issue: logs are created relatively
to current dir and not relatively to images dir(which is work dir, when --work-dir is not given).
To solve this lets init log after chdir(work_dir)
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>