Bug #29971 status.test fails

This test uses SHOW STATUS and the like, which may be unstable in the face
of logging to table, since the CSV handler is actively executing operations
and thus incrementing the counters.

Fixed by disabling logging to table for the duration of the test and restoring
it afterwards. This causes various counters to properly start counting from zero
and never advance due to CSV operations.

mysql-test/r/status.result

 set @old_concurrent_insert= @@global.concurrent_insert;
 set @@global.concurrent_insert= 0;
+SET @old_log_output = @@global.log_output;
+SET GLOBAL LOG_OUTPUT = 'FILE';
 flush status;
 show status like 'Table_lock%';
 Variable_name	Value
-Table_locks_immediate	1
+Table_locks_immediate	0
 Table_locks_waited	0
 select * from information_schema.session_status where variable_name like 'Table_lock%';
 VARIABLE_NAME	VARIABLE_VALUE
-TABLE_LOCKS_IMMEDIATE	2
+TABLE_LOCKS_IMMEDIATE	0
 TABLE_LOCKS_WAITED	0
 # Switched to connection: con1
 set sql_log_bin=0;
@@ -154,7 +156,7 @@ Variable_name	Value
 Com_show_status	3
 show status like 'hand%write%';
 Variable_name	Value
-Handler_write	5
+Handler_write	0
 show status like '%tmp%';
 Variable_name	Value
 Created_tmp_disk_tables	0
@@ -162,7 +164,7 @@ Created_tmp_files	0
 Created_tmp_tables	0
 show status like 'hand%write%';
 Variable_name	Value
-Handler_write	7
+Handler_write	0
 show status like '%tmp%';
 Variable_name	Value
 Created_tmp_disk_tables	0
@@ -237,3 +239,4 @@ SELECT 9;
 DROP PROCEDURE p1;
 DROP FUNCTION f1;
 set @@global.concurrent_insert= @old_concurrent_insert;
+SET GLOBAL log_output = @old_log_output;

mysql-test/t/status.test

@@ -12,6 +12,12 @@
 set @old_concurrent_insert= @@global.concurrent_insert;
 set @@global.concurrent_insert= 0;
 
+# Disable logging to table, since this will also cause table locking and unlocking, which will
+# show up in SHOW STATUS and may cause sporadic failures
+
+SET @old_log_output = @@global.log_output;
+SET GLOBAL LOG_OUTPUT = 'FILE';
+
 # PS causes different statistics
 --disable_ps_protocol
 
@@ -350,6 +356,7 @@ DROP FUNCTION f1;
 # Restore global concurrent_insert value. Keep in the end of the test file.
 --connection default
 set @@global.concurrent_insert= @old_concurrent_insert;
+SET GLOBAL log_output = @old_log_output;
 
 # Wait till we reached the initial number of concurrent sessions
 --source include/wait_until_count_sessions.inc