autotest/virt-test — pull request #768 by FengYang (2013-08-22 10:01:36+00:00)
Title: virttest.aexpect: Support ignore_status parameter in cmd

virttest.aexpect: Support ignore_status parameter in cmd().

When run some clean up command in guest. We may do not want to fail the case
for any exception in the command.
So add ignore_status parameter in cmd() to ignore exception.

qemu/tests/stop_continue call session.call() with ignore_status=True.
We do not want to fail the case for exception in clean up command.