Update config-gate systemd service

Add error handling to wait_for_config_init.sh
Handling the following error:

2025-09-02T07:03:32.706 controller-0 \
wait_for_config_init.sh[22308]: info \
Failed to get properties: Message recipient \
disconnected from message bus without replying

2025-09-02T07:03:32.707 controller-0 systemd[1]: \
info Finished General StarlingX config gate.

Test plan:

PASS - AIO-SX: iso install + config
PASS - AIO-DX: iso install + config
PASS - Standard with worker and storage node
       install + config
PASS - DC system controller: iso install + config

Closes-Bug: 2122164

Change-Id: Ic05b1f6805b1a798343b48238339056d0c95effe
Signed-off-by: Kyale, Eliud <Eliud.Kyale@windriver.com>

config-gate/files/wait_for_config_init.sh

@@ -10,6 +10,8 @@
 
 SERVICE=
 
+script_name=$(basename "$0")
+
 case $nodetype in
     controller)
         SERVICE=controllerconfig.service
@@ -26,10 +28,22 @@ case $nodetype in
 esac
 
 while :; do
-    systemctl status $SERVICE |grep -q running
-    if [ $? -ne 0 ]; then
+    status="$(systemctl status ${SERVICE} 2>&1)"
+    # verify systemctl status response format
+    # <service> - <Description>
+    # ...
+    if echo "${status}" | grep -q "${SERVICE}"
+    then
+            if ! echo "${status}" | grep -q running
+            then
+                msg="${SERVICE} has finished running."
+                logger -t "${script_name}" "${msg}"
+                echo "${script_name} - ${msg}"
                 exit 0
             fi
+    else
+        logger -t "${script_name}" "${status}"
+        echo "${script_name} - ${status}"
+    fi
     sleep 1
 done
-