L2SS-218 Turn of exit on error, loading LOFAR2.0 Tango DB does not return 0 on success

bootstrap/sbin/rebuild_system_from_scratch.sh

@@ -69,7 +69,10 @@ function start_minimal_tango()
 
 function configure_tango_db()
 {
+    # This somehow returns with a non-0 return code.
+    set +e
     ${HOME_DIR}/sbin/update_ConfigDb.sh ${HOME_DIR}/CDB/LOFAR_ConfigDb.json
+    set -e
 }
 
 function configure_elk()