BUG#38350: Many tests don't clean up after themselves on exit.

Problem: Many test cases don't clean up after themselves (fail
to drop tables or fail to reset variables). This implies that:
(1) check-testcase in the new mtr that currently lives in
5.1-rpl failed. (2) it may cause unexpected results in
subsequent tests.
Fix: make all tests clean up.
Also: cleaned away unnecessary output in rpl_packet.result
Also: fixed bug where rpl_log called RESET MASTER with a running
slave. This is not supposed to work.
Also: removed unnecessary code from rpl_stm_EE_err2 and made it
verify that an error occurred.
Also: removed unnecessary code from rpl_ndb_ctype_ucs2_def.


mysql-test/extra/rpl_tests/rpl_loaddata.test:
  Made test clean up after itself.
mysql-test/extra/rpl_tests/rpl_stm_EE_err2.test:
  Made test clean up after itself.
  Also removed unnecessary save_master_pos.
  Also made test verify that an error occurred.
mysql-test/extra/rpl_tests/rpl_truncate_helper.test:
  Made test clean up after itself.
mysql-test/include/query_cache.inc:
  Made test clean up after itself.
mysql-test/suite/binlog/t/binlog_auto_increment_bug33029.test:
  Made test clean up after itself.
mysql-test/suite/rpl/t/rpl_alter_db.test:
  Made test clean up after itself.
  Easiest to refactor the test a little, to use an auxiliary database instead of mysql:
  Then we don't need to read the collation at the start of the test and reset it at the
  end of the test. We can just drop the database.
mysql-test/suite/rpl/t/rpl_drop_db.test:
  Made test clean up after itself.
mysql-test/suite/rpl/t/rpl_drop_view.test:
  Made test clean up after itself.
mysql-test/suite/rpl/t/rpl_events.test:
  Made test clean up after itself.
mysql-test/suite/rpl/t/rpl_idempotency.test:
  Made test clean up after itself.
mysql-test/suite/rpl/t/rpl_ignore_table.test:
  Made test clean up after itself.
  The existing cleanup code didn't work, because the --replicate-*
  options prevented the "drop table" from being replicated. Moved
  "drop table t4" to a statement of its own.
mysql-test/suite/rpl/t/rpl_packet.test:
  Made test clean up after itself.
  Also replaced SHOW SLAVE STATUS by query_get_value(SHOW SLAVE STATUS...),
  since only one column of the result was interesting.
mysql-test/suite/rpl/t/rpl_row_max_relay_size.test:
  Made test clean up after itself.
  Instead of setting binlog format at the beginning of the test, we just
  do 'source include/have_binlog_format_row.inc' like all other tests.
mysql-test/suite/rpl_ndb/t/rpl_ndb_2other.test:
  Made test clean up after itself.
mysql-test/suite/rpl_ndb/t/rpl_ndb_ctype_ucs2_def.test:
  Made test clean up after itself.
  Also removed unnecessary 'create table; drop table'
  Also removed unnecessary use of --command
mysql-test/suite/rpl_ndb/t/rpl_ndb_multi.test:
  Made test clean up after itself.
mysql-test/t/innodb-autoinc-optimize.test:
  Made test clean up after itself.
mysql-test/t/innodb.test:
  Made test clean up after itself.
mysql-test/t/log_tables.test:
  Made test clean up after itself.
mysql-test/t/mysql_client_test.test:
  Made test clean up after itself.
mysql-test/t/partition.test:
  Made test clean up after itself.
mysql-test/t/status.test:
  Made test clean up after itself.

mysql-test/suite/rpl_ndb/r/rpl_ndb_2other.result

@@ -8,6 +8,7 @@ SET storage_engine=ndb;
 
 === NDB -> MYISAM ===
 
+set @old_slave_exec_mode= @@global.slave_exec_mode;
 set @@global.slave_exec_mode= 'IDEMPOTENT';
 CREATE TABLE mysql.ndb_apply_status
 ( server_id INT UNSIGNED NOT NULL,
@@ -803,3 +804,4 @@ TRUNCATE TABLE t1;
 --- Do Cleanup --
 DROP TABLE IF EXISTS t1;
 drop table mysql.ndb_apply_status;
+set @@global.slave_exec_mode= @old_slave_exec_mode;

mysql-test/suite/rpl_ndb/r/rpl_ndb_ctype_ucs2_def.result

@@ -11,8 +11,6 @@ show variables like "%character_set_ser%";
 Variable_name	Value
 character_set_server	ucs2
 DROP TABLE IF EXISTS t1;
-create table t1 (a int) ENGINE=NDB;
-drop table t1;
 CREATE TABLE `t1` ( `nid` int(11) NOT NULL default '0',
 `nom` char(4) default NULL,
 `prenom` char(4) default NULL,
@@ -25,3 +23,5 @@ nid	nom	prenom
 select * from t1 order by nid;
 nid	nom	prenom
 1	XYZ1	ABC1
+==== clean up ====
+DROP TABLE t1;

mysql-test/suite/rpl_ndb/r/rpl_ndb_multi.result

@@ -52,4 +52,6 @@ c1	c2	c3
 row3	C	3
 row4	D	4
 row5	E	5
+==== clean up ====
+DROP TABLE t1;
 STOP SLAVE;

mysql-test/suite/rpl_ndb/t/rpl_ndb_2other.test

@@ -25,6 +25,7 @@ remove_file $datadir/mysql/ndb_apply_status.frm;
 --error 0,1
 remove_file $datadir/mysql/ndb_apply_status.ndb;
 
+set @old_slave_exec_mode= @@global.slave_exec_mode;
 set @@global.slave_exec_mode= 'IDEMPOTENT';
 CREATE TABLE mysql.ndb_apply_status
                    ( server_id INT UNSIGNED NOT NULL,
@@ -46,3 +47,4 @@ SET storage_engine=innodb;
 
 connection slave;
 drop table mysql.ndb_apply_status;
+set @@global.slave_exec_mode= @old_slave_exec_mode;

mysql-test/suite/rpl_ndb/t/rpl_ndb_ctype_ucs2_def.test

@@ -22,10 +22,7 @@ show variables like "%character_set_ser%";
 --disable_warnings
 DROP TABLE IF EXISTS t1;
 --enable_warnings
-create table t1 (a int) ENGINE=NDB;
-drop table t1;
 
---connection master
 CREATE TABLE `t1` ( `nid` int(11) NOT NULL default '0',
                     `nom` char(4) default NULL,
                     `prenom` char(4) default NULL,
@@ -35,8 +32,12 @@ CREATE TABLE `t1` ( `nid` int(11) NOT NULL default '0',
 INSERT INTO t1 VALUES(1,"XYZ1","ABC1");
 select * from t1 order by nid;
 
---sync_slave_with_master
+sync_slave_with_master;
 # connect to slave and ensure data it there.
---connection slave
+connection slave;
 select * from t1 order by nid;
 
+--echo ==== clean up ====
+connection master;
+DROP TABLE t1;
+sync_slave_with_master;

mysql-test/suite/rpl_ndb/t/rpl_ndb_multi.test

@@ -64,4 +64,9 @@ sync_slave_with_master;
 connection slave;
 SELECT * FROM t1 ORDER BY c3;
 
+--echo ==== clean up ====
+connection server2;
+DROP TABLE t1;
+sync_slave_with_master;
+
 STOP SLAVE;