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
}
		finally
		{
			runningStatus = RUNNING_STATUS_STOP;
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IRunTask#run(org.eclipse.birt.core.archive.IDocumentArchive)
	 */
	public void run( IDocArchiveWriter archive ) throws EngineException
	{
		try
		{
			runningStatus = RUNNING_STATUS_RUNNING;
			if ( archive == null )
			{
				throw new EngineException(
						"Report archive is not specified when running a report." ); 
			}
			this.archive = archive;
			doRun( );
		}
		finally
		{
			runningStatus = RUNNING_STATUS_STOP;
		}
	}
	private void openReportDocument( ) throws EngineException