autotest/virt-test — pull request #930 by humanux (2013-10-15 07:04:49+00:00)
Title: virttest.aexpect : add send command safe

When using session.cmd, some times can not get the prompt, if
kernel print message when command execute. this patch
add a new method "add_cmd_safe",try to fix this issue

Signed-off-by: Yunping Zheng