6800ec378b
Add --auth_url, --username and --password and OS_* env vars as aliases to --auth, --user and --key. Default to --auth-version=2.0 if none of --auth, --user or --key are set or if OS_AUTH_URL is set. Ensure trailing '/' is present in --auth so URLs are created correctly. Fixes lp925212 Change-Id: Ic0008c5d5c1ab4fddbaab5d982ab60fed2c50019