TT#81700 set_config.sh: fix error when ngcpcfg fails

> Thu Feb 10 13:33:16 CET 2022 - Config files
> Thu Feb 10 13:33:16 CET 2022 - Added stir file keys
> 2022-02-10 13:33:16 spce: Error: Failed to call action 'apply' on 'spce' (see logs on 'spce')
> Thu Feb 10 13:33:17 CET 2022 - ngcpcfg apply returned 0
> Thu Feb 10 13:33:17 CET 2022 - Removed apicert.pem
> Thu Feb 10 13:33:17 CET 2022 - Setting config debug off
> ./set_config.sh: line 125: ./bin/config_debug.pl: No such file or directory
> ngcp-type: profile CE

Change-Id: Ifbe32da1539d2ce340687b8a0c5ceb7ad1a59ca6

set_config.sh

@@ -156,12 +156,14 @@ config() {
   fi
   echo "$(date) - Config files"
   "${BIN_DIR}/config_files.sh" "${GROUP}"
-  cd /etc/ngcp-config || exit 3
-  if ! ngcpcfg --summary-only apply "config debug on via kamailio-config-tests" ; then
-    echo "$(date) - ngcpcfg apply returned $?"
-    clean
-    error_flag=4
-  fi
+  (
+    cd /etc/ngcp-config || exit 3
+    if ! ngcpcfg --summary-only apply "config debug on via kamailio-config-tests" ; then
+      echo "$(date) - ngcpcfg apply returned $?"
+      clean
+      exit 4
+    fi
+  )
   dummy_add || error_flag=5
   dummy_up 0|| error_flag=5
   dummy_up 1|| error_flag=5