userid-validation: simplify label arguments

Use the concise explicit arguments rather than constructing a label.

```
$ ssh openbmc.gerrit gerrit review --help
...
 --ok-to-test N                         : score for Ok-To-Test
                                           0 No score
                                          +1 Ok to Test
```

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0b1013de71b40d2bd20d6fb09a376e9b64400b9a
1 file changed