Fix some log messages

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
Always set bus when creating disk

When using ide-disk it only uses the last added bus (ahci.5, ...)
scsi automatically looks for free bus or creates own. Thus it's
better to always set bus, when using helpers and have always the
same behaviour.

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
Add support for IDE disks

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>