[APIS-885] Change auto_commit mode to false when starting a distribut…

…ed transaction (#25)

http://jira.cubrid.org/browse/APIS-885

When using distributed transaction, rollback does not work, so data is entered into the DB.
In a distributed transaction, commit and rollback should be performed only through XAResource.

src/jdbc/cubrid/jdbc/driver/CUBRIDConnectionWrapperXA.java

@@ -129,6 +129,7 @@ void xa_start(UConnection u) {
         if (u != null) {
             u_con = u;
             u_con.setCUBRIDConnection(this);
+            u_con.setAutoCommit(auto_commit);
         }
     }
 
@@ -138,5 +139,6 @@ void xa_end(UConnection u) {
         xa_started = false;
         if (u != null) u_con = u;
         auto_commit = true;
+        u_con.setAutoCommit(auto_commit);
     }
 }