Fix tests in 2020

unfortunately, the year 2038 problem prevented me from pushing the deadline even further into the future.

Author: bmwiedemann

mysql-test/r/ddl_i18n_koi8r.result

@@ -49,7 +49,7 @@ SECOND	10	SELECT 1
 SELECT execute_at IS NULL, starts IS NULL, ends IS NULL, comment FROM mysql.event WHERE db='events_test' AND name='event_starts_test';
 execute_at IS NULL	starts IS NULL	ends IS NULL	comment
 1	0	1
-ALTER EVENT event_starts_test ON SCHEDULE AT '2020-02-02 20:00:02';
+ALTER EVENT event_starts_test ON SCHEDULE AT '1970-01-02 00:00:00' ON COMPLETION PRESERVE DISABLE;
 SELECT execute_at IS NULL, starts IS NULL, ends IS NULL, comment FROM mysql.event WHERE db='events_test' AND name='event_starts_test';
 execute_at IS NULL	starts IS NULL	ends IS NULL	comment
 0	1	1
@@ -62,7 +62,7 @@ SELECT execute_at IS NULL, starts IS NULL, ends IS NULL, comment FROM mysql.even
 execute_at IS NULL	starts IS NULL	ends IS NULL	comment
 0	1	1
 DROP EVENT event_starts_test;
-CREATE EVENT event_starts_test ON SCHEDULE EVERY 20 SECOND STARTS '2020-02-02 20:00:02' ENDS '2022-02-02 20:00:02' DO SELECT 2;
+CREATE EVENT event_starts_test ON SCHEDULE EVERY 20 SECOND STARTS '1970-01-02 00:00:00' ENDS '1970-01-03 00:00:00' ON COMPLETION PRESERVE DISABLE DO SELECT 2;
 SELECT execute_at IS NULL, starts IS NULL, ends IS NULL, comment FROM mysql.event WHERE db='events_test' AND name='event_starts_test';
 execute_at IS NULL	starts IS NULL	ends IS NULL	comment
 1	0	0

mysql-test/r/ddl_i18n_utf8.result

@@ -1424,7 +1424,7 @@ CREATE TABLE t1(c1 CHAR(10));
 CREATE TRIGGER t1_bi BEFORE INSERT ON t1
 FOR EACH ROW
 SET NEW.c1 = '����';
-CREATE EVENT ev1 ON SCHEDULE AT '2030-01-01 00:00:00' DO SELECT '����' AS test;
+CREATE EVENT ev1 ON SCHEDULE AT '1970-01-02 00:00:00' ON COMPLETION PRESERVE DISABLE DO SELECT '����' AS test;
 set names utf8;
 SHOW CREATE VIEW v1;
 View	Create View	character_set_client	collation_connection
@@ -1444,7 +1444,7 @@ FOR EACH ROW
 SET NEW.c1 = 'тест'	koi8r	koi8r_general_ci	latin1_swedish_ci
 SHOW CREATE EVENT ev1;
 Event	sql_mode	time_zone	Create Event	character_set_client	collation_connection	Database Collation
-ev1	SYSTEM	CREATE DEFINER=`root`@`localhost` EVENT `ev1` ON SCHEDULE AT '2030-01-01 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO SELECT 'тест' AS test	koi8r	koi8r_general_ci	latin1_swedish_ci
+ev1	SYSTEM	CREATE DEFINER=`root`@`localhost` EVENT `ev1` ON SCHEDULE AT '1970-01-02 00:00:00' ON COMPLETION PRESERVE DISABLE DO SELECT 'тест' AS test	koi8r	koi8r_general_ci	latin1_swedish_ci
 DROP VIEW v1;
 DROP PROCEDURE p1;
 DROP FUNCTION f1;