Bug 178164 Use IEngineTask.status constants and remove unnecessary status variables in EngineTask.
1)Remove following redundant variables in EngineTask used for status info. protected final int RUNNING_STATUS_START = 0; protected final int RUNNING_STATUS_RUNNING = 1; protected final int RUNNING_STATUS_STOP = 2; EngineTask already has access to constants declared in IEngineTask. Use those instead. 2)Remove the unused errorHandlingOption in EngineTask.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/RunTask.java
setupRenderOption( );
		
		loadDesign( );
		prepareDesign( );
		startFactory( );
		openReportDocument( );
		try
		{
			ReportRunnable report = executionContext.getRunnable( );
			writer.saveDesign( report );
			writer.saveParamters( inputValues );
			executionContext.openDataEngine( );
			synchronized(this)
			{
				if (!executionContext.isCanceled( ))
				{
					documentBuilder = new ReportDocumentBuilder(
							executionContext, writer );
				}
			}
			
			if ( documentBuilder != null )
			{
				if ( pageHandler != null )
				{
					documentBuilder.setPageHandler( pageHandler );
				}
				IContentEmitter emitter = documentBuilder.getContentEmitter( );
				ReportExecutor executor = new ReportExecutor( executionContext,
						report.getReportIR( ),