virt.qemu: Adds timedrift test without network interface.

test:
   guest_suspend
   guest_pause_resume

Signed-off-by: Jiří Župka <jzupka@redhat.com>
virt.qemu: Changes in timedrift_no_net tests for linux

Makes debug more verbose. Clean code from preparation
for windows tests.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
virt.qemu: Fix changes in redirs wasn't mirrored to devices.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
virt.qemu: Adds windows timedrift not ntp-sync tests.

Check timedrift with suspend, hibernate, stop_continue tests.

Makes Windows be able to suspend or hibernate it is necessary
have installed all drivers and selected gpu with suspend
and hibernation support. (tested with qxl and WinXP)

Signed-off-by: Jiří Župka <jzupka@redhat.com>