initscripts: Don't remove .lock file as it's not used anymore + also remove pidfile in celerybeats init script.

contrib/debian/init.d/celerybeat

@@ -98,6 +98,7 @@ case "$1" in
   stop)
     log_daemon_msg "Stopping celery periodic task scheduler" "celerybeat"
     if start-stop-daemon --stop --quiet --oknodo --pidfile $CELERYBEAT_PID_FILE; then log_end_msg 0 else
+        rm -f "$CELERYBEAT_PID_FILE"
         log_end_msg 1
     fi
     ;;

contrib/debian/init.d/celeryd

@@ -93,8 +93,7 @@ case "$1" in
     log_daemon_msg "Stopping celery task worker server" "celeryd"
     if start-stop-daemon --stop --quiet --pidfile $CELERYD_PID_FILE; 
     then
-        rm -f $CELERYD_PID_FILE
-        rm -f ${CELERYD_PID_FILE}.lock
+        rm -f "$CELERYD_PID_FILE"
         log_end_msg 0
     else
         log_end_msg 1