Disable set_feature/clear_feature test case under Windows.
Disable set_feature/clear_feature test case under Windows.

We are having trouble with clear_halt call in Windows. Disable this test
until we find out what's going on.

swinman/pyusb,makerbot/pyusb,kopchik/pyusb,kopchik/pyusb,h3nj3/pyusb,karlp/pyusb,rabryan/pyusb,makerbot/pyusb,karlp/pyusb,AlanJAS/pyusb,rabryan/pyusb,h3nj3/pyusb,AlanJAS/pyusb,swinman/pyusb