qemu.tests: Update some virito dirver test case for Windows guests

Prepre guests for whql tests. Will boot up with default drivers
and update virtio drivers inside guest.

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Acked-by: Suqin Huang <shuang@redhat.com>

Update the win_virtio_update CDROM check method, will update the
driver install command line instead of assign letter to the
source cdroms. Also fix the missing import problem.

changes from v1:
  - Add the missing import logging

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Acked-by: Feng Yang <fyang@redhat.com>

This process will make the driver install very slow in low version
guests. So clean up this kind of windows before install drivers.

changes from v1:
  - put the check cmd just before the driver install
  - update the pattern to find the process id
changes from v2:
  - only kill this process in XP and 2003

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Acked-by: Xiaoqing Wei <xwei@redhat.com>

Check if details as version, copyright and driver name in sys file
is the same as in inf files.

changes from v1:
  - fix the nic name

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Acked-by: Suqin Huang <shuang@redhat.com>

Add a case for virtio_win driver upgrade and downgrade. The operation
will finished by an autoit scripts inside guest

changes from v1:
  - Fix the conflict with other patches

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Acked-by: Suqin Huang <shuang@redhat.com>
qemu.tests: Add virtio_driver_sign_check test script

changs from v1:
Update error log.
Add some info log.

Signed-off-by: Feng Yang <fyang@redhat.com>