drop users at the end of events_stress


mysql-test/r/ps_1general.result:
  update result
mysql-test/r/skip_name_resolve.result:
  update result
mysql-test/r/sp_notembedded.result:
  update result
mysql-test/r/status.result:
  update result
mysql-test/t/events_stress.test:
  drop users created in the test