virt: modify libvirtd_status() to libvirtd_is_running()

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
Merge pull request #626 from liyangfnst/libvirt_status

virt: modify libvirtd_status() to libvirtd_is_running()
qemu.tests : Add script for multiple nics stress test

This patch add script for multiple nics stress test, both support linux
and windows