MDEV-11185: innodb.innodb_trx_weight fails in buildbot

Problem was that test assumes locks to be granted on first-come-first-served (FCFS)
policy. However, in 10.2 we use by default Variance-Aware-Transaction-Scheduling
(VATS) algorithm. Test failure fixed by setting lock wait policy to FCFS.

mysql-test/suite/innodb/disabled.def

@@ -11,4 +11,4 @@
 ##############################################################################
 
 innodb_defragment_fill_factor : MDEV-10771
-innodb.innodb_trx_weight      : MDEV-11185
+

mysql-test/suite/innodb/t/innodb_trx_weight.opt

+--loose-innodb-lock-schedule-algorithm=FCFS