Splitting out moderator check from syntax check

- Attempt to clarify CI runs from contributors

scripts/premoderator.sh

@@ -11,5 +11,8 @@ issue=$(echo ${CI_BUILD_REF_NAME} | perl -ne '/^pr-(\d+)-\S+$/ && print $1')
 user=$(curl ${CURL_ARGS} "https://api.github.com/repos/kubernetes-incubator/kargo/issues/${issue}/comments" \
   | jq -M "map(select(.body | contains (\"$MAGIC\"))) | .[0] .user.login" | tr -d '"')
 # Check for the required user group membership to allow (exit 0) or decline (exit >0) the pipeline
-[ "$user" != "null" ] || exit 1
+if [ "$user" = "null" ]; then
+	echo "User does not have permissions to start CI run"
+	exit 1
+fi
 curl ${CURL_ARGS} "https://api.github.com/orgs/kubernetes-incubator/members/${user}"