virt.tests: update iozone_windows test

use utils_misc.get_winutils_vol() to instead static volume ID, becase
winutils cdrom has different volume ID when use different driver_format
on different windows guest;
Signed-off-by: NXu Tian <xutian@redhat.com>

tests/cfg/iozone_windows.cfg

@@ -2,5 +2,12 @@
     virt_test_type = qemu libvirt
     only Windows
     type = iozone_windows
-    iozone_cmd = "D:\IOzone\iozone.exe -a"
-    iozone_timeout = 3600
+    cdrom_cd1 = isos/windows/winutils.iso
+    iozone_cmd = "%s:\iozone\iozone -azR -r 64k -n 1G -g 4G -M -b iozone.xls -f c:\testfile"
+    iozone_timeout = 7200
+    mem = 2048
+    variants:
+        aio_native:
+            image_aio = native
+        aio_threads:
+            image_aio = threads

tests/iozone_windows.py

 import logging, os
 from autotest.client import utils
 from virttest import postprocess_iozone
+from virttest import utils_misc
 
 
 def run_iozone_windows(test, params, env):
@@ -24,7 +25,8 @@ def run_iozone_windows(test, params, env):
     analysisdir = os.path.join(test.resultsdir, 'analysis_%s' % test.iteration)
 
     # Run IOzone and record its results
-    c = params.get("iozone_cmd")
+    drive_letter = utils_misc.get_winutils_vol(session)
+    c = params["iozone_cmd"] % drive_letter
     t = int(params.get("iozone_timeout"))
     logging.info("Running IOzone command on guest, timeout %ss", t)
     results = session.cmd_output(cmd=c, timeout=t)