virt: Add ntpdate and get_date function to set and get date time

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
Merge pull request #1436 from liyangfnst/time

virt: Add ntpdate and get_date function to set and get date time
Apply hmp/qmp filters only if -c is not passed in the command line

It seems I keep forgetting -c. Sorry about that, this
patch fixes the problem.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Revert "Apply hmp/qmp filters only if -c is not passed in the command line"

This reverts commit 3d40d9c3bd5f9960715a0051c42e8833fd93315a.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Revert "run: Don't overwrite monitors when using --monitor"

This reverts commit 5637ed15b59395ceeeb657fbb61f6308d64492e8.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
virttest.libvirt_xml: Add sysinfo xml handler

Add sysinfo_xml module to handle sysinfo xml operation.

Signed-off-by: Wayne Sun <gsun@redhat.com>
virttest.virsh: Add virsh sysinfo command function

Signed-off-by: Wayne Sun <gsun@redhat.com>