virt-install: fix virt undefine error
For UEFI domains we get the following error unless we add
`--nvram` to the call to undefine:
```
error: Failed to undefine domain coreos-inst-597-1552671442
error: Requested operation is not valid: cannot undefine domain with nvram
```
@@ -267,7 +267,7 @@ try:
cleanup_argv.append('--skip-partition-fixups')
run_sync_verbose(cleanup_argv)
finally:
- subprocess.call(['virsh', '--connect=qemu:///session', 'undefine', domain])
+ subprocess.call(['virsh', '--connect=qemu:///session', 'undefine', '--nvram', domain])
if tail_proc is not None:
tail_proc.terminate()
if http_proc is not None:
