spider/bugfix.mdev_26582, spider/bugfix.mdev_27184, spider/bugfix.mdev_27240 MTR tests fail

CURRENT_TEST: spider/bugfix.mdev_26582

mysqltest: At line 17: query 'INSERT INTO t VALUES (0)' failed with wrong errno 1227: 'Access denied; you need (at least one of) the SUPER privilege(s) for this operation', instead of 1429...

The result from queries just before the failure was:

#

# MDEV-26582 SIGSEGV in spider_db_bulk_insert and spider_db_connect and spider_db_before_query, and hang in "End of update loop" / "Reset for next command" query states

#

CREATE DATABASE IF NOT EXISTS auto_test_local;

USE auto_test_local;

CREATE TABLE t (i CHAR) ENGINE=SPIDER;

INSERT INTO t VALUES (0);