Bug#11753728 45225: Locking: hang if drop table with no timeout

Fix a failure of the re-enabled innodb-index.test in the embedded server.
Apparently, the embedded server does not default to ENGINE=InnoDB when
copying an InnoDB table by CREATE TABLE t2 SELECT * FROM t1;

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

@@ -1087,7 +1087,8 @@ DROP TABLE t2;
 DROP TABLE t1;
 CREATE TABLE t1 (a INT, b CHAR(1)) ENGINE=InnoDB;
 INSERT INTO t1 VALUES (3,'a'),(3,'b'),(1,'c'),(0,'d'),(1,'e');
-CREATE TABLE t2 SELECT * FROM t1;
+CREATE TABLE t2 (a INT, b CHAR(1)) ENGINE=InnoDB;
+INSERT INTO t2 SELECT * FROM t1;
 BEGIN;
 SELECT * FROM t1;
 a	b

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

@@ -521,7 +521,8 @@ connect (b,localhost,root,,);
 connection a;
 CREATE TABLE t1 (a INT, b CHAR(1)) ENGINE=InnoDB;
 INSERT INTO t1 VALUES (3,'a'),(3,'b'),(1,'c'),(0,'d'),(1,'e');
-CREATE TABLE t2 SELECT * FROM t1;
+CREATE TABLE t2 (a INT, b CHAR(1)) ENGINE=InnoDB;
+INSERT INTO t2 SELECT * FROM t1;
 connection b;
 BEGIN;
 # This acquires a MDL lock on t1 until commit.