Tweak test timing

Author: ggilder

localtests/panic-on-warnings-update-pk-with-duplicate-on-new-unique-index/create.sql

@@ -13,7 +13,7 @@ drop event if exists gh_ost_test;
 delimiter ;;
 create event gh_ost_test
   on schedule every 1 second
-  starts current_timestamp + interval 8 second
+  starts current_timestamp + interval 6 second
   ends current_timestamp + interval 60 second
   on completion not preserve
   enable
@@ -22,7 +22,7 @@ begin
   -- This UPDATE modifies the primary key, so it will be converted to DELETE + INSERT
   -- The INSERT will attempt to insert email='alice@example.com' (duplicate)
   -- which violates the new unique index being added by the migration
-  -- Delay of 8s ensures this fires after row copy starts (throttle delays until 5s)
-  -- so the duplicate is caught during DML event application, not row copy
+  -- Delay of 6s ensures this fires after row copy starts (throttle delays until 5s)
+  -- but before migration completes, so duplicate is caught during DML event application
   update gh_ost_test set id=10, email='alice@example.com' where id=2;
 end ;;