Do not convert the result of udev.device_get_md_devices() to int.
Do not convert the result of udev.device_get_md_devices() to int.

udev.device_get_md_devices() does the conversion.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

dwlehman/blivet,jkonecny12/blivet,rvykydal/blivet,vojtechtrefny/blivet,rhinstaller/blivet,rvykydal/blivet,vojtechtrefny/blivet,AdamWill/blivet,AdamWill/blivet,vpodzime/blivet,dwlehman/blivet,rhinstaller/blivet,jkonecny12/blivet,vpodzime/blivet