dbinit: Grant the cleaner rights to purge celery_taskmeta

src/master/dbscripts/initdb

@@ -790,9 +790,11 @@ else
 
 	psql -U "$DBADMIN" -d "$DB" $DBPARAMS <<ENDSQL
 BEGIN;
+GRANT SELECT (date_done) ON celery_taskmeta TO $DBCLEANER;
 GRANT SELECT (created_at) ON router_loggedpacket TO $DBCLEANER;
 GRANT SELECT (date) ON router_registrationcode TO $DBCLEANER;
 GRANT SELECT (id, router_id, time, remote_port, remote_address, local_port, direction, rule_id, protocol, count, archived, tcp_flags) ON router_loggedpacket TO $DBARCHIVIST;
+GRANT DELETE ON celery_taskmeta TO $DBCLEANER;
 GRANT DELETE ON router_loggedpacket TO $DBCLEANER;
 GRANT DELETE ON router_registrationcode TO $DBCLEANER;
 GRANT UPDATE (archived) ON router_loggedpacket TO $DBARCHIVIST;