Update doc to be consistent with the luci version
Update doc to be consistent with the luci version

I'm on 1f8ba359e84dc7f26b1ba286dfb4e28674efbff4 of luci-py, as instructed by setup.md.
When invoking the run_isolated.py command, it failed because of parameter name mismatch.

```
$  ~/Desktop/repo/luci-py/run_isolated.py  --auth=none --verbose --leak-temp-dir --hash a53d4fcadd33d1a5a7f8a8b26fffc7f29e8aa953
Usage: run_isolated.py <options>

run_isolated.py: error: ambiguous option: --auth (--auth-host-port, --auth-method, --auth-no-local-webserver, --auth-tokens-cache?)
```
cloudera/dist_test,cloudera/dist_test,cloudera/dist_test,cloudera/dist_test