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
private void closeConnection( Connection conn )
    {
        if ( conn == null )
            return;     
        
        try
        {
            conn.close();
        }
        catch( SQLException e )
        { 
             
        }    
    }
    
	private boolean isExpectedDriver( Driver driver, String className )
	{
		String actual;
		if ( driver instanceof WrappedDriver )
			actual = driver.toString();
		else
			actual = driver.getClass( ).getName( );
		return isExpectedDriverClass( actual, className); 
	}
	
	private boolean isExpectedDriverClass( String actual, String expected)
	{