Try to make sure DROP DATABASE does not cause a deadlock because we now let InnoDB wait MySQL does not have open handles to tables we drop


sql/sql_db.cc:
  Try to make sure DROP DATABASE does not cause a deadlock because we now let InnoDB wait MySQL does not have open handles to tables we drop
innobase/row/row0mysql.c:
  Try to make sure DROP DATABASE does not cause a deadlock because we now let InnoDB wait MySQL does not have open handles to tables we drop