Bug#41186: Possible reason of bug is waiting any sql error on slave instead

exact number of error. The patch does following:
1) Add new parameter $slave_sql_errno for wait_for_slave_sql_error.inc
2) Add waiting error 1062 (Duplicate PK) for slave SQL thread in test case.

mysql-test/include/wait_for_slave_sql_error.inc

@@ -7,15 +7,29 @@
 #
 # source include/wait_for_slave_sql_error.inc;
 #
-# Parameters to this macro are $slave_timeout and
-# $slave_keep_connection. See wait_for_slave_param.inc for
-# descriptions.
+# Parameters:
+#
+# $slave_sql_errno
+#   Number of expected SQL error. If it skipped then any error
+#   will pass.
+# 
+# $slave_timeout and
+#   See wait_for_slave_param.inc for descriptions.
+# 
+# $slave_keep_connection. 
+#   See wait_for_slave_param.inc for descriptions.
 
 let $old_slave_param_comparison= $slave_param_comparison;
 
 let $slave_param= Last_SQL_Errno;
 let $slave_param_comparison= !=;
 let $slave_param_value= 0;
+
+if ($slave_sql_errno) {
+  let $slave_param_comparison= =;
+  let $slave_param_value= $slave_sql_errno;
+}
+
 let $slave_error_message= Failed while waiting for slave to produce an error in its sql thread;
 source include/wait_for_slave_param.inc;
 let $slave_error_message= ;

mysql-test/suite/rpl/t/rpl_stm_mystery22.test

@@ -28,6 +28,7 @@ insert into t1 values(NULL,'new');
 save_master_pos;
 connection slave;
 # wait until the slave tries to run the query, fails and aborts slave thread
+let $slave_sql_errno= 1062;
 source include/wait_for_slave_sql_error.inc;
 select * from t1 order by n;
 delete from t1 where n = 2;