qemu.tests.virtio_console: Reconnect guest worker in migrate test

Before we can cleanup after migrate test the guest worker has to
reconnect to the current VM. The session itself works fine
as the VM was migrated, but the VM object is different and reports
non-living VM, which results in impropper cleanup.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

qemu/tests/virtio_console.py

@@ -1424,6 +1424,7 @@ def run_virtio_console(test, params, env):
             raise error.TestFail(msg)
 
         # CLEANUP
+        guest_worker.reconnect(vm)
         guest_worker.safe_exit_loopback_threads([ports[0]], ports[1:])
 
         for thread in threads: