virt.tests: update iozone and iometer windows tests

Add new method utils_misc.get_winutils_vol() to get winutils cdrom volume ID by Volume ID (ISO file need to create by command: mkisofs -J -V "WIN_UTILS" -o winutils.iso /xxxxx) to avoid incorrect volume ID when use extra CDROM;

Instead format disk related code with run sub test format_disk to avoid duplicate configuration in iometer_windows test;

Move icf file from winutils.iso to deps folder to make update icf become more easy if tester want to adjust iometer_windows test;

Replace static volume ID in cfg with utils_misc.get_winutils_vol()  to avoid test fail when use different drive_format in windows guest;

Updated iozone_windows test configuration;

Thanks,
Xu