Bug 211004 Failed to remove temp db directory after running multiple reports
Description: I use Report Engine API to do runAndrender, run and dataextract tasks on multiple reports. Before the Platform started, I change the temp folder(System.setProperty( "java.io.tmpdir", TEMP_HOME )). Each task is closed after it finished and I shutdown the Platform after all the tasks finished. In log I found "Fail to remove one or more file in temp db directory,but it will be removed when the VM exits: D:\BIRT_NG\temp/BIRTSampleDB_1196129572031_10a6ae2". In temp folder the BIRTSampleDB_XXX is still here but not removed. I think it is the issue when remove the Temp sampleDB. Build number: 2.3.0.v20071127-0630
data/org.eclipse.birt.report.data.oda.jdbc/src/org/eclipse/birt/report/data/oda/jdbc/JDBCDriverManager.java
* @throws SQLException
     * @throws OdaException
     */
    public Connection getConnection( String driverClass, String url, 
                                String jndiNameUrl,
                                Properties connectionProperties, String driverClassPath ) 
        throws SQLException, OdaException
    {
        validateConnectionUrl( url, jndiNameUrl);
        if ( logger.isLoggable( Level.FINE ) )
            logger.fine( "Request JDBC Connection: driverClass=" + driverClass +  
                        "; url=" + url +            
                        "; jndi name url=" + jndiNameUrl );  
        
        return doConnect( driverClass, url, jndiNameUrl, connectionProperties, driverClassPath );
    }
	
	/**
	 * Implementation of getConnection() methods. Gets connection from either java.sql.DriverManager, 
	 * or from IConnectionFactory defined in the extension
	 */    
    private synchronized Connection doConnect( String driverClass, String url, 
            String jndiNameUrl,
            Properties connectionProperties, String driverClassPath ) throws SQLException, OdaException
    {
		assert ( url != null );
		IConnectionFactory factory = getDriverConnectionFactory (driverClass);
		if ( factory != null )
		{