[Libguestfs] [PATCH v2 0/1] appliance: init: Avoid running degraded md devices

It is a second version of the earlier sent patch. I've added more clear explanation what does it fix and why the issue happened in first place. Also I split the patch (the patch itself and two independent tests): [PATCH v2 1/3] appliance: init: Avoid running degraded md devices [PATCH v2 2/3] tests: md: test guestfish finds logical volume on md [PATCH v2 3/3] tests: md: test guestfish finds md and LV devices in