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
diff --git a/jenkins/userid-validation b/jenkins/userid-validation
index fc882ee..026b877 100755
--- a/jenkins/userid-validation
+++ b/jenkins/userid-validation
@@ -26,7 +26,7 @@
     echo "Unable to find committer."
     "${GERRIT_SSH_CMD[@]}" review \
         "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
-        --label=Ok-To-Test=0 "--message='Unable to determine committer'"
+        --ok-to-test=0 "--message='Unable to determine committer'"
     exit 1
 fi
 
@@ -39,14 +39,14 @@
     echo "Unable to determine github user for ${COMMITTER_EMAIL}."
     "${GERRIT_SSH_CMD[@]}" review \
         "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
-        --label=Ok-To-Test=0 "--message='Unable to determine github user'"
+        --ok-to-test=0 "--message='Unable to determine github user'"
     exit 1
 fi
 
 # Reset the vote to 0 so jenkins will detect a new +1 on retriggers
 "${GERRIT_SSH_CMD[@]}" review \
     "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
-    --label=Ok-To-Test=0 -t autogenerated:jenkins
+    --ok-to-test=0 -t autogenerated:jenkins
 
 # Write full list of users to a file
 GERRIT_CI_GROUPS=( \
@@ -93,13 +93,13 @@
 if grep -q -w "${COMMITTER_USERNAME}" "$WORKSPACE/users.txt"; then
     "${GERRIT_SSH_CMD[@]}" review \
         "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
-        --label=Ok-To-Test=1 -t autogenerated:jenkins \
+        --ok-to-test=1 -t autogenerated:jenkins \
         "--message='User approved, CI ok to start'"
 
     # Immediately erase the score to prevent infinite triggers.
     "${GERRIT_SSH_CMD[@]}" review \
         "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
-        --label=Ok-To-Test=0 -t autogenerated:jenkins
+        --ok-to-test=0 -t autogenerated:jenkins
 
     exit 0
 fi
@@ -107,7 +107,7 @@
 echo "${COMMITTER_USERNAME} is not on the approved list."
 "${GERRIT_SSH_CMD[@]}" review \
     "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
-    --label=Ok-To-Test=0 -t autogenerated:jenkins \
+    --ok-to-test=0 -t autogenerated:jenkins \
     "--message='User not approved, see admin, no CI'"
 
 exit 0