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
assert dir != null && dir.isDirectory();
		boolean success = true;
		String[] children = dir.list();
		for	( int i=0; i < children.length; i++) 
		{
			File child = new File( dir, children[i]);
			if( child.isDirectory()) 
			{
				if (! removeDirectory( child ) )
				{
					success = false;
				}
			}
			else 
			{
				if ( ! child.delete() )
				{
					logger.info( "Failed to delete temp file " + child.getAbsolutePath());
					success = false;
				}
	         }
		}
		if ( ! dir.delete() )
		{
			success = false;
		}
		return success;
	}
}