Fix not_embedded_server to check if the value of com_select changed

regardless of it's current value  

mysql-test/r/not_embedded_server.result

@@ -4,9 +4,4 @@ ID	USER	HOST	DB	COMMAND	TIME	STATE	INFO
 number	root	localhost	test	Query	time	executing	SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST WHERE COMMAND!='Daemon'
 deallocate prepare stmt1;
 FLUSH STATUS;
-SHOW GLOBAL STATUS LIKE 'com_select';
-Variable_name	Value
-Com_select	102
-SHOW GLOBAL STATUS LIKE 'com_select';
-Variable_name	Value
-Com_select	102
+Value of com_select did not change

mysql-test/t/not_embedded_server.test

@@ -48,10 +48,16 @@ while ($i)
 --enable_query_log
 --enable_result_log
 
-SHOW GLOBAL STATUS LIKE 'com_select';
+let $before= query_get_value(SHOW GLOBAL STATUS LIKE 'com_select',Value,1);
 
 --change_user
 
-SHOW GLOBAL STATUS LIKE 'com_select';
+let $after= query_get_value(SHOW GLOBAL STATUS LIKE 'com_select',Value,1);
+
+if (`select $after != $before`){
+  SHOW GLOBAL STATUS LIKE 'com_select';
+  die The value of com_select changed during change_user;
+}
+echo Value of com_select did not change;
 
 # End of 5.1 tests