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
logger.log( Level.WARNING, 
						"Failed to register wrapped driver instance.", e);
			}
		}		
		registeredDrivers.put( className, DRIVER_REGISTERED );
	}
	
	/**
	 * Search driver in the "drivers" directory and load it if found
	 * @param className
	 * @return
	 * @throws OdaException 
	 * @throws DriverException
	 * @throws OdaException
	 */
	private Class loadExtraDriver(String className, boolean refreshUrlsWhenFail, String driverClassPath) throws OdaException
	{
		assert className != null;
		
		if( extraDriverLoader == null)
			extraDriverLoader = new DriverClassLoader( driverClassPath );
		
		try
		{
			return extraDriverLoader.loadClass(className);
		}
		catch ( ClassNotFoundException e )
		{