Speed up the test innodb.lock_insert_into_empty

Let us use innodb_lock_wait_timeout=0 for an immediate timeout.
Also, do not override the timeout in the default connection,
so that further tests will use the default setting.

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

@@ -5,17 +5,20 @@ BEGIN;
 DELETE FROM t1;
 INSERT INTO t2 VALUES(1),(1);
 ERROR 23000: Duplicate entry '1' for key 'PRIMARY'
-connect  con1,localhost,root,,;
 BEGIN;
 SELECT * FROM t2 LOCK IN SHARE MODE;
 a
-connection default;
-SET innodb_lock_wait_timeout=1;
+connect  con1,localhost,root,,;
+SET innodb_lock_wait_timeout=0;
 INSERT INTO t2 VALUES(2);
 ERROR HY000: Lock wait timeout exceeded; try restarting transaction
-disconnect con1;
+connection default;
+ROLLBACK;
+connection con1;
 INSERT INTO t2 VALUES(3);
 COMMIT;
+disconnect con1;
+connection default;
 SELECT * FROM t1;
 a
 SELECT * FROM t2;
@@ -45,7 +48,7 @@ INSERT INTO t1 SET k=1;
 START TRANSACTION;
 INSERT INTO t1 SET k=2;
 connect  con1,localhost,root,,test;
-SET innodb_lock_wait_timeout= 1;
+SET innodb_lock_wait_timeout=0;
 CREATE TABLE t2 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=InnoDB
 AS SELECT k FROM t1;
 ERROR HY000: Lock wait timeout exceeded; try restarting transaction

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

@@ -9,17 +9,20 @@ DELETE FROM t1;
 --error ER_DUP_ENTRY
 INSERT INTO t2 VALUES(1),(1);
 
-connect (con1,localhost,root,,);
 BEGIN;
 SELECT * FROM t2 LOCK IN SHARE MODE;
 
-connection default;
-SET innodb_lock_wait_timeout=1;
+connect (con1,localhost,root,,);
+SET innodb_lock_wait_timeout=0;
 --error ER_LOCK_WAIT_TIMEOUT
 INSERT INTO t2 VALUES(2);
-disconnect con1;
+connection default;
+ROLLBACK;
+connection con1;
 INSERT INTO t2 VALUES(3);
 COMMIT;
+disconnect con1;
+connection default;
 
 SELECT * FROM t1;
 SELECT * FROM t2;
@@ -50,7 +53,7 @@ START TRANSACTION;
 INSERT INTO t1 SET k=2;
 
 --connect (con1,localhost,root,,test)
-SET innodb_lock_wait_timeout= 1;
+SET innodb_lock_wait_timeout=0;
 --error ER_LOCK_WAIT_TIMEOUT
 CREATE TABLE t2 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=InnoDB
 AS SELECT k FROM t1;