fix innodb.row_lock test to work in 10.0

mysql-test/suite/innodb/r/row_lock.result

@@ -6,10 +6,7 @@ CREATE TABLE t3 (e INT) ENGINE=InnoDB;
 CREATE TABLE t4 ENGINE=InnoDB AS SELECT * FROM t2;
 BEGIN;
 UPDATE t1 SET a = 0 WHERE a = ( SELECT e FROM t3 );
-SET DEBUG_SYNC='srv_suspend_mysql_thread_enter SIGNAL waiting';
 UPDATE t4 SET d = 1 WHERE d in ( SELECT a FROM t1 ) ORDER BY c LIMIT 6;
-SET DEBUG_SYNC='now WAIT_FOR waiting';
-SET DEBUG_SYNC='RESET';
 UPDATE t4 SET d = 9;
 ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
 commit;

mysql-test/suite/innodb/t/row_lock.test

-if (`select plugin_auth_version < "5.6.17" from information_schema.plugins where plugin_name='innodb'`)
-{
-  --skip Not fixed in InnoDB before 5.6.17
-}
-
 #
 # Test of wrong call to unlock_row
 # MDEV-5629 Failing assertion: state == TRX_STATE_NOT_STARTED on
@@ -10,7 +5,6 @@ if (`select plugin_auth_version < "5.6.17" from information_schema.plugins where
 #
 
 --source include/have_innodb.inc
---source include/have_debug_sync.inc
 
 CREATE TABLE t1 (a INT, b INT) ENGINE=InnoDB;
 INSERT INTO t1 VALUES (1,1),(2,2);
@@ -28,17 +22,17 @@ UPDATE t1 SET a = 0 WHERE a = ( SELECT e FROM t3 );
 
 --connect (con12,localhost,root,,test)
 
-SET DEBUG_SYNC='srv_suspend_mysql_thread_enter SIGNAL waiting';
-
 --send 
 UPDATE t4 SET d = 1 WHERE d in ( SELECT a FROM t1 ) ORDER BY c LIMIT 6;
 
 --connection con11
 
 # Wait for con12 to start waiting for con11
-
-SET DEBUG_SYNC='now WAIT_FOR waiting';
-SET DEBUG_SYNC='RESET';
+let $wait_condition=
+  select count(*) = 1 from information_schema.innodb_trx
+  where trx_state = "lock wait" and
+        trx_query like "%SELECT a FROM t1%";
+--source include/wait_condition.inc
 
 UPDATE t4 SET d = 9;