autotest/virt-test — pull request #1894 by xutian (2014-11-21 08:08:42+00:00)
Title: virttest.env_process: update vm.virtnet when vm is not alive

If start_vm is yes and reused vm is not alive we need to update virtnet
info then create it too, which will avoid to get bad vm.

Signed-off-by: Xu Tian