Description: The swift command tool will set the auth version
to 2 if OS_AUTH_URL is set even use -V 1 option to set Version
to 1.So when use nova/glance client and swift client in the
same shell, and export environment OS_AUTH_URL, it will lead
swift client to raise 400 error if swift not use keystone
for auth.
Fixes bug 1034158
Change-Id: I8003ff2ad4ac25fd710f87c4dab1507f6040ed3d