setTransactionIsolation behaviour in network client driver is different from 
that of embedded driver
----------------------------------------------------------------------------------------------------

         Key: DERBY-638
         URL: http://issues.apache.org/jira/browse/DERBY-638
     Project: Derby
        Type: Bug
  Components: Network Client  
    Versions: 10.2.0.0    
    Reporter: Deepa Remesh


When autocommit is set to false, a call to setTransactionIsolation using client 
driver does not end the transaction when the method exits. When a close() is 
called on the conection, it throws an exception.

Running the code below:

       conn.setAutoCommit(false);
       conn.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
       try{
               conn.close();
       }catch(SQLException se){
               System.out.println("Got exception when closing the connection");
               se.printStackTrace();
       }

with client driver gives:
Got exception when closing the connection
org.apache.derby.client.am.SqlException: java.sql.Connection.close() requested 
while a transaction is in progress on the connection.The transaction remains 
active, and the connection cannot be closed.

with embedded driver, it works okay and does not throw any exception.

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