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;