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.sampledb/src/org/eclipse/birt/report/data/oda/sampledb/SampledbPlugin.java
{
	private static final Logger logger = Logger.getLogger( SampledbPlugin.class.getName( ) );
	
	private static String dbDir;
	private static final String SAMPLE_DB_NAME = "BirtSample";
	private static final String SAMPLE_DB_JAR_FILE = "BirtSample.jar";
	private static final String SAMPLE_DB_HOME_DIR = "db";
	
	private static int startCount = 0;
	
	/**
	 * @see org.eclipse.core.runtime.Plugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception
	{
		logger.info( "Sampledb plugin starts up. Current startCount=" + startCount);
		synchronized ( SampledbPlugin.class )
		{
			if ( ++startCount == 1 )
			{
				
				
				init();
			}
		}