Check warnings in servers error log as part of test case

mysql-test/r/mysqlcheck.result

@@ -1,6 +1,9 @@
 DROP TABLE IF EXISTS t1, `t``1`, `t 1`;
 drop view if exists v1;
 drop database if exists client_test_db;
+mtr.global_supressions                             OK
+mtr.suspicious_patterns                            OK
+mtr.test_supressions                               OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK