Make: Fix start-background-node

While it is not very important since the command is not
used often it is worth fixing.

Author: lhoguin

deps/rabbit_common/mk/rabbitmq-run.mk

@@ -319,7 +319,7 @@ start-background-node: node-tmpdir $(DIST_TARGET)
 	  $(RABBITMQ_SERVER) \
 	  $(REDIRECT_STDIO) &
 	ERL_LIBS="$(DIST_ERL_LIBS)" \
-	  $(RABBITMQCTL) -n $(RABBITMQ_NODENAME) wait --timeout $(RMQCTL_WAIT_TIMEOUT) $(RABBITMQ_PID_FILE) kernel
+	  $(RABBITMQCTL) -n $(RABBITMQ_NODENAME) wait --timeout $(RMQCTL_WAIT_TIMEOUT) $(RABBITMQ_PID_FILE)
 
 start-background-broker: node-tmpdir $(DIST_TARGET)
 	$(BASIC_SCRIPT_ENV_SETTINGS) \