Allow mysql_upgrade to enable event after table is corrected

new features:
set event_scheduler=ON|OFF will now try to init event scheduler
if it's not enabled
set event_scheduler=default will try to enable it based on
the value of the event_scheduler when mysqld was started

client/mysql_upgrade.c

@@ -865,6 +865,7 @@ static const char *expected_errors[]=
   "ERROR 1060", /* Duplicate column name */
   "ERROR 1061", /* Duplicate key name */
   "ERROR 1054", /* Unknown column */
+  "ERROR 1290", /* RR_OPTION_PREVENTS_STATEMENT */
   0
 };