.github/workflows/04-maven-nit.yml: fix reporting error exit codes

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

.github/workflows/04-maven-nit.yml

@@ -111,5 +111,5 @@ jobs:
         upsdrvctl start
         upsd -DDDDDD &
         UPSD_PID="$!"
-        trap 'kill $UPSD_PID ; upsdrvctl stop' 0 1 2 3 15
+        trap 'RES=$?; kill $UPSD_PID ; upsdrvctl stop; exit $RES' 0 1 2 3 15
         java -jar ./jNutList/target/jNutList-*-jar-with-dependencies.jar $SSL_ARGS -w --setvar driver.debug 1 localhost "${NUT_PORT}" "admin" "${TESTPASS_ADMIN}" || exit