wl#4091

improving a test that shows a failure.

the wait condition was for data in tables but the 
log positions are updates after the data are unlocked.
So there was a time window
[after_table_unlock_for_select, log_pos_updated] where the
orig cond was true but log position might be changed.
the correct one is to expect the last pos of the
slave's insert in the output of show_slave_status on the
master.


mysql-test/suite/rpl/t/rpl_flushlog_loop.test:
  refining a sychronization condition (2 times)

mysql-test/suite/rpl/t/rpl_flushlog_loop.test

@@ -45,25 +45,31 @@ CREATE TABLE t1 (a INT KEY) ENGINE= MyISAM;
 let $wait_binlog_event= CREATE TABLE t1;
 --source include/wait_for_binlog_event.inc
 sync_slave_with_master;
+
 connection master;
 INSERT INTO t1 VALUE(1);
 --enable_query_log
 FLUSH LOGS;
+let $slave_param_value= query_get_value(SHOW MASTER STATUS, Position, 1);
+
 connection slave;
-let $wait_condition= SELECT COUNT(*) = 1 FROM t1;
--- source include/wait_condition.inc
+let $slave_param= Exec_Master_Log_Pos;
+source include/wait_for_slave_param.inc;
+
 --disable_query_log
 INSERT INTO t1 VALUE(2);
+let $slave_param_value= query_get_value(SHOW MASTER STATUS, Position, 1);
 --enable_query_log
+
 connection master;
-let $wait_condition= SELECT COUNT(*) = 2 FROM t1;
--- source include/wait_condition.inc
+let $slave_param= Exec_Master_Log_Pos;
+source include/wait_for_slave_param.inc;
+
 --enable_query_log
 
 #
 #  Show status of slave
 #
-let $pos= query_get_value(SHOW SLAVE STATUS, Read_Master_Log_Pos, 1);
---replace_result $SLAVE_MYPORT SLAVE_PORT $pos POSITION
+--replace_result $SLAVE_MYPORT SLAVE_PORT $slave_param_value POSITION
 --replace_column 1 # 8 # 9 # 16 # 23 # 33 # 34 # 35 #
 --query_vertical SHOW SLAVE STATUS