autotest/autotest — pull request #121 by zhouqt (2011-12-26 12:43:12+00:00)
Title: Update usb.py test for testing some usb options

This patchset:
* Makes a function to add usb device (except usb-storage, it's related to -drive parameter, thus it's handled in add_drive() function).
* Adds setup a test for checking some options for usb storage/controller.