autotest/virt-test — pull request #998 by yangdongsheng (2013-11-05 07:40:31+00:00)
Title: libvirt_vm: fix for setup_serial_console.

Sometimes, VM.serial_ports is not None, but the VM.serial_console is None,
then we need to setup a serial_console in VM.setup_serial_console() method,
instead of returning immediatly.

Signed-off-by: Dongsheng Yang