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/RenderTask.java
{
		private long pageNumber;
		public PageRender( long pageNumber )
		{
			this.pageNumber = pageNumber;
		}
		protected IReportExecutor createReader( )
		{
			return new ReportPageReader( executionContext, pageNumber,
					IReportContentLoader.NO_PAGE );
		}
		protected void load( ReportContentLoader loader, IContentEmitter emitter )
		{
			loader.loadPage( pageNumber, IReportContentLoader.MULTI_PAGES,
					emitter );
		}
	}
	/**
	 * Renders a range of pages. 
	 */
	private class PageRangeRender extends InnerRender