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
throw new JDBCException( ResourceConstants.CANNOT_LOAD_DRIVER,
							null,
							className );
			}
		}
		Driver driver = null;
		try
		{
			driver = (Driver) driverClass.newInstance( );
		}
		catch ( Exception e )
		{
			logger.log( Level.WARNING, "Failed to create new instance of JDBC driver:" + className, e);
			throw new JDBCException( ResourceConstants.CANNOT_INSTANTIATE_DRIVER, null, className );
		}
		return driver;
	}
	
	/**
	 * Deregister the driver by the given class name from DriverManager
	 * 
	 * @param className
	 * @return true if deregister the driver successfully
	 * @throws OdaException
	 */
	public boolean deregisterDriver( String className ) throws OdaException
	{
		if ( className == null || className.length() == 0)
			
			return false;