UCS: fixes a bug in bareos-dir-restart-on-change

bareos-dir-restart-on-change did call itself, causing a infinite loop
instead of calling bareos-dir-restart.
This is fixed now. Without this fix, changes done via the UCS
Webinterface did trigger this problem. This script is called once a day via
cron.

platforms/univention/bareos-dir-restart-on-change

@@ -4,5 +4,5 @@
 # and bareos-dir test succeeds (without manual editing the config files, this should always be the case)
 # restart bareos-dir
 cd /etc/bareos/autogenerated
-test clients.include -nt .timestamp -o ! -f .timestamp && /usr/share/univention-bareos/bareos-dir-restart-on-change && touch .timestamp
+test clients.include -nt .timestamp -o ! -f .timestamp && /usr/share/univention-bareos/bareos-dir-restart && touch .timestamp