Fix domain renaming when it wasn't defined in libvirt
Fix domain renaming when it wasn't defined in libvirt

Fixes QubesOS/qubes-issues#1632

QubesOS/qubes-core-admin,QubesOS/qubes-core-admin,marmarek/qubes-core-admin,marmarek/qubes-core-admin,QubesOS/qubes-core-admin,woju/qubes-core-admin,marmarek/qubes-core-admin,woju/qubes-core-admin,woju/qubes-core-admin,woju/qubes-core-admin