utils_test.HostStress: Set default value for params.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
utils_test: Pass correct args to control file.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
utils_test.run_autotest: Support to pass args for control.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
libvirt_vm: Resume vm in destroy() when vm is paused.

There are some cases need to suspend vm, and in postprocess,
we need to kill vm by vm.destroy(). But when vm is paused,
vm.destroy() will wait 240s to login it. Then find it is not
loginable and kill it with virsh.destroy().

We waste 240s at this case, we should check the state of vm
before we login it.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
virt: Fix a bug in cgroup module

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
Merge pull request #1714 from liyangfnst/cgroup_fix

virt: Fix a bug in cgroup module
Merge pull request #1710 from yangdongsheng/destroy

libvirt_vm: Resume vm in destroy() when vm is paused.
Merge pull request #1664 from yumingfei/migration_enhancements

Utils_test: Migration enhancements
virttest.utils_net: support IPv6 setup and cleanup both local and remote host

Signed-off-by: Alex Jia <chuanchang.jia@gmail.com>