Added missing test files for rwsplit router tests.

server/modules/routing/readwritesplit/test/test_autocommit_disabled1b.sql

@@ -0,0 +1,7 @@
+use test;
+drop table if exists t1;
+create table t1 (id integer);
+set autocommit=OFF;               -- open transaction
+insert into t1 values(1);       -- write to master
+select count(*) from t1;        -- read from master
+drop table t1;

server/modules/routing/readwritesplit/test/test_transaction_routing2b.sql

@@ -0,0 +1,11 @@
+USE test; 
+SET autocommit = Off; 
+START TRANSACTION; 
+CREATE TABLE IF NOT EXISTS myCity (a int, b char(20)); 
+INSERT INTO myCity VALUES (1, 'Milan'); 
+INSERT INTO myCity VALUES (2, 'London'); 
+COMMIT; 
+START TRANSACTION; 
+DELETE FROM myCity;
+SELECT COUNT(*) FROM myCity; -- read transaction's modifications from master
+COMMIT;

server/modules/routing/readwritesplit/test/test_transaction_routing3b.sql

@@ -0,0 +1,7 @@
+-- Read from slave after implicit COMMIT
+USE test; 
+START TRANSACTION; 
+CREATE TABLE IF NOT EXISTS T2 (id integer); 
+INSERT INTO T2 VALUES (@@server_id);
+SET AUTOCOMMIT=oN;
+SELECT id from T2; -- read transaction's modifications from slave

server/modules/routing/readwritesplit/test/test_transaction_routing4b.sql

@@ -0,0 +1,9 @@
+USE test; 
+SET autocommit = oFf; 
+CREATE TABLE IF NOT EXISTS myCity (a int, b char(20)); 
+INSERT INTO myCity VALUES (1, 'Milan'); 
+INSERT INTO myCity VALUES (2, 'London'); 
+COMMIT;
+DELETE FROM myCity; -- implicit transaction started
+SELECT COUNT(*) FROM myCity; -- read transaction's modifications from master
+COMMIT;