fix(mtr):fix mtr to use non-innodb (#245)

Co-authored-by: Nmergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

mysql-test/include/default_mysqld.cnf

@@ -21,6 +21,7 @@ loose-innodb_read_io_threads=     2
 loose-innodb_log_buffer_size=     1M
 loose-innodb_log_file_size=       5M
 loose-innodb_log_files_in_group=  2
+default-storage-engine=InnoDB
 
 slave-net-timeout=120