handling so that indexes are closed before trying to commit the
transaction. (Bug #15536)


mysql-test/r/bdb.result:
  Add new results
mysql-test/t/bdb.test:
  Add new test
sql/sql_delete.cc:
  Move call to free_underlaid_joins() to before ha_autocommit_or_rollback().
sql/sql_insert.cc:
  Move call to free_underlaid_joins() to before ha_autocommit_or_rollback().
sql/sql_update.cc:
  Move call to free_underlaid_joins() to before ha_autocommit_or_rollback().