qemu: Forbid migration of machines with I/O errors
qemu: Forbid migration of machines with I/O errors

https://bugzilla.redhat.com/show_bug.cgi?id=972675

Such machine can't be successuflly migrated unles the I/O error has
recovered and might lead to data corruption. Forbid this kind of
migration.
(cherry picked from commit 5f719f217ebf89668ca3c404e4b8288179c26c92)

mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2